How Long Does It Take to Heal Leaky Gut? Set the Retest Date

No calendar answers that. A merely bruised gut lining often recovers with time because it renews within days, but a wall open for years may not close on time alone. The real answer is a dual-sugar urine test repeated on a date set before treatment; the strongest repair-nutrient trial retested at eight weeks.

Feeling better and then stalling for months does not prove a gut cannot heal. More often it means nobody scheduled the measurement that would show whether the wall closed.

How long does it take to heal leaky gut? No calendar can answer that, and the question tends to hide a missing step. In the video above, A Plateau Is Not a Personality, Dr. Gurpreet Singh Padda, MD, MBA, MHP, walks through Chapter 29 of The Angry Gut, written with Ami Michelle Grimes. The case is a man of forty-five who worked through every step his clinicians set, reached roughly sixty percent better, and then sat there for five months while a urine sugar test kept showing that his gut wall had not closed.

The Angry Gut treats your gut as the first brain, with the second brain sitting in your skull. A wall that stays open keeps feeding metaflammation into both, which is why a plateau deserves a measurement rather than a shrug.

How long does it take to heal leaky gut? Set the date first

For years Dr. Padda gave the standard advice: rest the bowel, eat bland food and give it time, because the lining renews itself within days. For a lining that is merely bruised, that often works. For a wall that has been open for four years, time alone has no end point, because a body cannot rebuild a barrier out of materials it lacks. Think of a crew idling at a job site with no lumber delivery on the schedule.

So the honest answer to how long is conditional. In the strongest trial of a repair nutrient, the course lasted eight weeks and the wall was measured again at the end. In the case from the video, the sugar ratio came back inside range at twelve weeks, for the first time in four years. That is one man, practice-reported figures from our own population, not trial outcomes, and individual results vary. What turned it into a result rather than a feeling was the second measurement, on a date chosen before treatment began.

How do you know if your leaky gut is healing?

That measurement is a dual-sugar urine test. You drink two sugars the body does not break down. Mannitol, the small one, passes through the lining cells, so it reflects how much absorbing surface remains. Lactulose, the larger one, gets across mainly when the seals between cells have loosened. Both leave in the urine over roughly six hours, and dividing one by the other strips out differences in stomach emptying, fluid intake and kidney function. What remains is a number that climbs as the gaps widen. A physician orders it.

A zonulin blood kit cannot stand in for it. Three research teams compared the commonly sold kit with measured permeability and found no meaningful relationship, as explained in how to test for leaky gut. A symptom diary cannot stand in for it either. In a stomach infection trial of a zinc compound, every group reported significant symptom improvement, including the group given antibiotics without any zinc.

Why does leaky gut healing stall?

A plateau can mean the wall is short of supplies. Three shortfalls have human or chemical evidence behind them, at different strengths.

• Zinc. Working from national food supplies rather than blood tests, one model put 17.3% of people worldwide at risk of eating too little zinc. Risk climbed with phytate, the phosphorus store in grains and legumes that locks up zinc before it can be absorbed. The authors asked for people to be measured rather than judged from the map.
• Glycine. A flux calculation for a 70 kg adult found that the body’s own production plus an ordinary diet falls about 10 g a day short of demand, collagen building included. That is arithmetic from published rates, not a shortage seen in a patient.
• Vitamin D. In 27 people with Crohn’s disease in remission, gut permeability held steady on supplementation while the placebo group’s worsened, and those whose blood level climbed to at least 75 nmol/L showed lower inflammation markers. That last finding was an after-the-fact analysis.

The social driver sits on the plate. Low-priced grain and bean staples are what people are told to eat for their health, and they come carrying their own zinc blocker. Glutamine has the strongest trial of any repair material, and the amounts on retail bottles often differ from the amounts studied, which is one more reason none of this belongs in a self-directed plan. Whether a nutrient fits your situation, and at what dose, is a decision for your physician, and so is any change to a medication you already take.

What Measura can measure during a stalled recovery

Measura [Cardiometabolic and Autonomic Health Analysis] does not offer the dual-sugar test, zonulin or any other gut permeability test; those are arranged elsewhere. What it measures is the body the gut wall belongs to. That matters because the people who stall are often the people clinical trials leave out, those with metabolic disease, long medication lists and poor sleep.

• Laboratory panels, chosen with your physician, can show the insulin resistance and inflammation that metaflammation leaves behind. Insulin resistance and metabolic health explains what those numbers mean.
• Bioimpedance body composition separates muscle from fat. If a long gut protocol has narrowed what you eat, that split is worth knowing, because a scale cannot see it.
• Indirect calorimetry measures how much energy your body burns at rest, so you and your physician can compare what you eat with what your body is using while it tries to rebuild. See metabolic rate and energy.

Every finding goes to your physician. Measura measures; it does not diagnose or treat a leaky gut.

Questions to bring to your physician

• Can we measure my gut wall with a dual-sugar urine test before we change anything?
• On what date will we repeat it, and what result would tell us to stop?
• Should my zinc and vitamin D levels be checked instead of assumed?
• Were the doses I have been taking the same doses that were studied?
• Could insulin resistance, body composition or my resting metabolic rate be part of why I stalled?

What happens when bile stops arriving on time is covered in the previous post on bile acid malabsorption, and the next post puts the pieces together as one terrain. Every study behind these numbers, with what each one cannot show, is in the Chapter 29 book companion. Unmeasured is unmanaged, and a plateau with no retest date quietly becomes the new normal.

Frequently asked questions

References

• Zhou, Q., Verne, M. L., Fields, J. Z., Lefante, J. J., Basra, S., Salameh, H., & Verne, G. N. (2019). Randomised placebo-controlled trial of dietary glutamine supplements for postinfectious irritable bowel syndrome. Gut, 68(6), 996-1002. https://doi.org/10.1136/gutjnl-2017-315136
• Massier, L., Chakaroun, R., Kovacs, P., & Heiker, J. T. (2021). Blurring the picture in leaky gut research: How shortcomings of zonulin as a biomarker mislead the field of intestinal permeability. Gut, 70(9), 1801-1802. https://doi.org/10.1136/gutjnl-2020-323026
• Tan, B., Luo, H.-Q., Xu, H., Lv, N.-H., Shi, R.-H., Luo, H.-S., Li, J.-S., Ren, J.-L., Zou, Y.-Y., Li, Y.-Q., Ji, F., Fang, J.-Y., & Qian, J.-M. (2017). Polaprezinc combined with clarithromycin-based triple therapy for Helicobacter pylori-associated gastritis: A prospective, multicenter, randomized clinical trial. PLoS One, 12(4), e0175625. https://doi.org/10.1371/journal.pone.0175625
• Wessells, K. R., & Brown, K. H. (2012). Estimating the global prevalence of zinc deficiency: Results based on zinc availability in national food supplies and the prevalence of stunting. PLoS One, 7(11), e50568. https://doi.org/10.1371/journal.pone.0050568
• Meléndez-Hevia, E., De Paz-Lugo, P., Cornish-Bowden, A., & Cárdenas, M. L. (2009). A weak link in metabolism: The metabolic capacity for glycine biosynthesis does not satisfy the need for collagen synthesis. Journal of Biosciences, 34(6), 853-872. https://doi.org/10.1007/s12038-009-0100-9
• Raftery, T., Martineau, A. R., Greiller, C. L., Ghosh, S., McNamara, D., Bennett, K., Meddings, J., & O’Sullivan, M. (2015). Effects of vitamin D supplementation on intestinal permeability, cathelicidin and disease markers in Crohn’s disease: Results from a randomised double-blind placebo-controlled study. United European Gastroenterology Journal, 3(3), 294-302. https://doi.org/10.1177/2050640615572176

Related reading

• Bile Acid Malabsorption After Gallbladder Surgery: What to Measure
• How to Maintain Weight Loss When the Scale Stops Telling the Truth
• Laboratory Panels

Polypharmacy in the Elderly: What Nine Bottles Hide From Your Numbers

Polypharmacy in elderly adults is a long daily medication list, and its quieter risk is that prescriptions get renewed for years with nobody rechecking the measurement behind them. Measuring before the medication review is what shows whether each one is still needed.

Every bottle in a long medication list was started to move a number. Years later, few people can say whether that number still needs moving.

In one national analysis, 39.0% of Americans over 65 took at least five prescription medicines every day. Polypharmacy in elderly adults is usually discussed as a question of drug interactions. The quieter problem is that each bottle was started because of a measurement, and most are renewed for years without anyone checking whether that measurement still says the same thing.

In the video Two-Thirds of Your Pill Is Not the Drug, Dr. Gurpreet Singh Padda, MD, MBA, MHP, coauthor of The Angry Gut with Ami Michelle Grimes, follows a sixty-eight-year-old man who carried nine bottles to his appointment in a plastic bag. Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service: it measures, and your physician decides. What follows is the measurement side of his story.

Why is polypharmacy in elderly adults a problem?

His list was ordinary. A statin, a blood pressure pill, metformin, an acid blocker renewed for eleven years, a daily anti-inflammatory for his knees, low-dose aspirin, an antidepressant, a laxative and a multivitamin. Alongside them he had bloating, stools that alternated between loose and absent, and a tiredness his cardiologist credited to age.

Every one of those prescriptions could be defended when it was written. The trouble is structural. Each belongs to a different office, and a routine visit checks names and doses, not the combined effect of the bag on the person carrying it. No single clinician owns the whole list, so in practice nobody does. That is the social half of the problem, and it is why a number matters more than another conversation.

What do the inactive ingredients in pills do to your gut?

Dr. Padda admits he spent most of his career assuming the inactive part of a label was inert. The measurements changed his mind. Among the most prescribed oral medicines in the United States, the typical tablet or capsule holds 280 mg of inactive ingredient against 164 mg of drug, spread across 8.8 separate inactive ingredients. Someone on 10 prescriptions swallows roughly 2.8 g of that material each day.

The contents matter more than the weight. Lactose is present in 45% of oral solid medicines, and 55% of oral medications carry at least one FODMAP sugar, a group of fermentable carbohydrates that can inflate a sensitive gut. The federal register lists 3296 approved excipients, and their inactive label rests mostly on animal tolerability or long use. When researchers screened them against biological targets, 38 showed 134 activities across 44 targets. Most never reach meaningful blood levels. In the bowel itself, formulation chemicals can be up to 100 times more concentrated than the drug.

Hence the book’s vocabulary: the gut, thirty-two square meters of living surface, is the first brain, and the organ in the skull is the second brain. The second brain rarely encounters these compounds. The first brain handles every one of them, undiluted.

The injury a routine visit cannot see

The anti-inflammatory in that bag is the plainest example of damage that never reaches the chart. Forty healthy volunteers took an ordinary dose for two weeks and then swallowed a capsule camera. New small-bowel findings appeared in 68%, and 40% had open breaks in the lining. In long-term users the camera found visible injury in 71%, compared with 10% of people not taking the drug, and most people with such lesions feel nothing. An acid blocker does not shield the small intestine either: in one trial, injury ran 2.7 times higher when one was added.

Be clear about what that means for testing. Capsule endoscopy and fecal calprotectin, the stool inflammation marker used in those studies, are not Measura tests. They are gastrointestinal studies ordered and performed elsewhere. What they show is that a medication review ending at no stomach pain has not actually looked.

Do medications change your gut bacteria?

The bag also works as a group. In a laboratory screen of more than a thousand marketed compounds, 24% of drugs aimed at human targets slowed the growth of at least one gut bacterial strain. In people the effect is narrower. Across 1,883 human stool metagenomes, acid blockers, metformin, antibiotics and laxatives showed the strongest links, and three of those four classes sat in his bag. In 4,198 people, many drugs taken together produced a distinct microbial structure with weaker short-chain fatty acid metabolism, and the pattern reversed once drugs were stopped.

A disturbed lining and a rearranged community both feed metaflammation, the low-grade metabolic inflammation that sits under insulin resistance, vascular disease and chronic pain. That links a gut story to the numbers the rest of the bag was prescribed for.

Is the reason for each bottle still true?

Here is the part a drug list cannot answer. A good medication audit asks every bottle what it was for, whether that purpose still applies, and what stopping it would trade away. The middle question is a measurement question. It needs the numbers each drug was started to change.

• The metformin was written for blood sugar. Laboratory panels show where blood sugar and lipid markers stand now, not eleven years ago.
• The statin and the blood pressure pill were written for arteries. Arterial stiffness and endothelial function testing looks at how the vessel walls themselves are behaving.
• Weight belongs in the gut story too. In an unselected health-check population, obesity carried an odds ratio of 2.30 for small-bowel breaks and smoking 1.85, apart from aspirin. Bioimpedance body composition separates fat from muscle, which a scale cannot do.
• The fatigue was credited to age. Indirect calorimetry measures resting energy use directly, one piece of an answer instead of an assumption.

None of these tests diagnoses a side effect, and none decides a prescription. They give the physician who owns the list something firmer than habit. Unmeasured is unmanaged, and a bag renewed for a decade is the clearest case of it. For the limits of any single result, read what a test result can and cannot tell you.

How do you prepare for a medication review?

For that man, four changes were made with his cardiologist rather than by him alone. The anti-inflammatory came off. The acid blocker was tapered and reassessed. The laxative and the multivitamin were switched to formulations that fit his dietitian’s sugar list. Every drug with a current reason stayed. The model is a review done with a physician, never a purge done at home.

• Bring the containers themselves; formulations differ by manufacturer.
• Note the year each daily medicine began.
• Ask which number each drug was meant to change, and when it was last checked.
• Change nothing on your own.

Every study above, including the ones that cut against the argument, is in the book’s Deep Dive companion. To plan the visit, use questions worth asking your doctor. The series continues with the nerve that carries the gut’s complaints upward, in what a vagus nerve test can and cannot show.

Frequently asked questions

References

• Reker, D., Blum, S. M., Steiger, C., Anger, K. E., Sommer, J. M., Fanikos, J., & Traverso, G. (2019). “Inactive” ingredients in oral medications. Science Translational Medicine, 11(483), eaau6753. https://doi.org/10.1126/scitranslmed.aau6753
• Pottel, J., Armstrong, D., Zou, L., Fekete, A., Huang, X.-P., Torosyan, H., Bednarczyk, D., Whitebread, S., Bhhatarai, B., Liang, G., Jin, H., Ghaemi, S. N., Slocum, S., Lukacs, K. V., Irwin, J. J., Berg, E. L., Giacomini, K. M., Roth, B. L., Shoichet, B. K., & Urban, L. (2020). The activities of drug inactive ingredients on biological targets. Science, 369(6502), 403–413. https://doi.org/10.1126/science.aaz9906
• Maiden, L., Thjodleifsson, B., Theodors, A., Gonzalez, J., & Bjarnason, I. (2005). A quantitative analysis of NSAID-induced small bowel pathology by capsule enteroscopy. Gastroenterology, 128(5), 1172–1178. https://doi.org/10.1053/j.gastro.2005.03.020
• Graham, D. Y., Opekun, A. R., Willingham, F. F., & Qureshi, W. A. (2005). Visible small-intestinal mucosal injury in chronic NSAID users. Clinical Gastroenterology and Hepatology, 3(1), 55–59. https://doi.org/10.1016/s1542-3565(04)00603-2
• Watanabe, T., Fujiwara, Y., & Chan, F. K. L. (2019). Current knowledge on non-steroidal anti-inflammatory drug-induced small-bowel damage: a comprehensive review. Journal of Gastroenterology, 55(5), 481–495. https://doi.org/10.1007/s00535-019-01657-8
• Maier, L., Pruteanu, M., Kuhn, M., Zeller, G., Telzerow, A., Anderson, E. E., Brochado, A. R., Fernandez, K. C., Dose, H., Mori, H., Patil, K. R., Bork, P., & Typas, A. (2018). Extensive impact of non-antibiotic drugs on human gut bacteria. Nature, 555(7698), 623–628. https://doi.org/10.1038/nature25979
• Vich Vila, A., Collij, V., Sanna, S., Sinha, T., Imhann, F., Bourgonje, A. R., Mujagic, Z., Jonkers, D. M. A. E., Masclee, A. A. M., Fu, J., Kurilshikov, A., Wijmenga, C., Zhernakova, A., & Weersma, R. K. (2020). Impact of commonly used drugs on the composition and metabolic function of the gut microbiota. Nature Communications, 11(1), 362. https://doi.org/10.1038/s41467-019-14177-z
• Nagata, N., Nishijima, S., Miyoshi-Akiyama, T., Kojima, Y., Kimura, M., Aoki, R., Ohsugi, M., Ueki, K., Miki, K., Iwata, E., Hayakawa, K., Ohmagari, N., Oka, S., Mizokami, M., Itoi, T., Kawai, T., Uemura, N., & Hattori, M. (2022). Population-level metagenomics uncovers distinct effects of multiple medications on the human gut microbiome. Gastroenterology, 163(4), 1038–1052. https://doi.org/10.1053/j.gastro.2022.06.070
• Sun, X., Wang, F., Liu, J., Wu, L., Wang, Z., Chen, X., Wang, M., & Zeng, Q. (2022). Risk factors for small-intestinal mucosal breaks beyond aspirin. Journal of Gastroenterology and Hepatology, 37(8), 1596–1602. https://doi.org/10.1111/jgh.15892

Related reading

• Can Inflammation Cause Anxiety? What Blood Work and Testing Show
• Vagus Nerve and Anxiety: What a Heart Reading Shows About Your Gut
• Laboratory Panels

Questions to Ask a Pain Management Doctor About Your Numbers

Ask what is generating the pain, whether your A1c, sleep and mood have been checked, and how the two of you will measure whether treatment worked. Those answers come from numbers, not from a clinic’s star rating.

Online stars grade how a visit felt. They cannot see a blood sugar in the prediabetic range, a sleep disorder nobody tested for, or a hip hiding behind back pain.

Most people choose a pain clinic the way they choose a restaurant, and the stars they trust were never designed to see inside a body. The questions to ask a pain management doctor are the ones a rating cannot answer: what is generating the pain, what else in your body is feeding it, and how anyone will know whether treatment worked. Chapter 19 of The Pained Brain by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD, is the subject of the video above, Kindness Is the Baseline, Not the Achievement. The studies behind each figure here, with their limits, are in the book companion for chapter 19.

What can a star rating not tell you about a pain doctor?

Across 614 heart surgeons, ratings averaged 4.4 of 5 whether a surgeon’s bypass death rate sat in the best quartile or the worst. Reviews of pain physicians rise on words about courtesy and fall on words about waiting, time and pain that did not go away. The reviewers are honest. They grade what they saw, which is how the front desk and the doctor treated them. Nobody can grade a blood test that was never drawn or a sleep problem nobody asked about.

So a five-star clinic can be a pleasant place where the drivers of your pain go unmeasured for years. The composite patient in the book had eleven visits in fourteen months, three injections and a satisfaction survey every time, and nobody examined his hip, checked a fasting insulin or asked how he slept.

What does a short pain visit usually miss?

The average primary care visit, measured from electronic record time stamps, lasts 18.0 minutes. In videotaped visits, doctors covered about six topics and spent roughly 1.1 minutes on each one after the largest. That arithmetic is an economic driver of missed disease: whatever is not the chief complaint gets a minute, and the questions that uncover sugar, sleep and mood are the first to fall off the schedule.

• Blood sugar. One hand clinic tested the A1c of 84 patients with problems such as trigger finger and carpal tunnel syndrome. In 58.3 percent the result was in the prediabetic range, and 43.4 percent of patients with an abnormal result had no primary care provider at all.
• Sleep. Among chronic pain clinic patients on opioids who completed an overnight study, 58.8 percent had sleep apnea. Among 90 people referred for high-impact chronic pain, 51.1 percent had it, and they looked no different from the rest on pain, disability or sleepiness.
• Mood. Pooled across 376 studies of adults with chronic pain, 39.3 percent had clinically significant depressive symptoms and 40.2 percent had anxiety symptoms.

The first two are biological engines. Chronically high glucose and insulin keep tissue in the low-grade, body-wide inflammation the book calls metaflammation, and untreated apnea fragments sleep night after night, which leaves a sensitized nervous system no chance to settle. Neither shows up on a pain scale.

Why a normal-looking person still needs numbers

On NHANES 2009–2016, under 12.2 percent of American adults counted as metabolically healthy; on the stricter criteria used after 2021, the share drops under 7 percent. In our own clinic population the share is under 3 percent overall and under 1 percent among chronic pain patients. These figures are practice-reported, drawn from our own population, not trial outcomes, and individual results vary. The point is that looking fine and measuring fine are different claims. Dr. Padda admits he spent years telling patients with a borderline A1c that it was not too bad, reading the number as reassurance instead of as a warning. Unmeasured is unmanaged, and misread is not much better.

How does a doctor find where the pain is coming from?

In one spine surgeon’s clinic, 17.5 percent of 200 back pain patients had hip or sacroiliac joint disease alongside the spine, and 8 percent had it instead of any spine problem. Of 286 people sent on to a tertiary center, only 12 percent left with the same diagnosis they arrived carrying. Finding the generator is done with hands, history and, when needed, a diagnostic injection. Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service; it measures, it does not treat, and no reading it produces can tell anyone which joint or nerve is the source. Any clinic that promises a blood test will locate your pain is selling something.

What tests should you ask a pain doctor about?

What Measura can do is put numbers on the terrain around the pain, with every result sent to your physician to interpret.

• Laboratory panels, the blood work where markers such as A1c and fasting insulin belong.
• Bioimpedance body composition, which separates muscle from fat so the scale does not stand in for metabolic health.
• Heart rate variability, a reading of autonomic tone, the balance between the stress and recovery sides of the nervous system.

Apnea is confirmed by an overnight sleep study, performed outside Measura. Screening for depression and anxiety belongs with your physician or a behavioral clinician. A good workup also rules things out: screening 62 fibromyalgia patients for celiac disease found no cases, and vitamin D did not independently predict regional musculoskeletal pain in 349,221 UK adults once other factors were adjusted. For what insulin trouble looks like before a diagnosis, read what insulin resistance looks like before diabetes.

Questions to ask a pain management doctor

1. What do you believe is generating my pain, in a sentence I can repeat? Back pain patients who were unsure of their diagnosis carried more depression and disability than patients who felt certain, even with equal pain.
2. What is my A1c, and has anyone measured fasting insulin?
3. Have I been tested for sleep apnea with a study, not just a questionnaire?
4. Which tests are you choosing not to order, and why?
5. How will we know this worked, and when will we check? Researchers call a 30 percent drop in pain meaningful, while 110 pain clinic patients asked to define success named 56 percent. Agree on the target at the start.

Kindness still matters. Among 1,023 Scottish patients, high physician empathy carried odds of 5.7 for symptom improvement against 20.1 for satisfaction, which is exactly why a satisfied patient is not proof of an effective plan. Bring the list to your next appointment, use how to prepare to organize your history, and when the question becomes whether the pain is a nerve or a joint, read nerve pain after knee replacement.

Frequently asked questions

References

• Heiting, C., Wickes, C. B., Katakam, S., Herrera, C., Li, B., Intravia, J., Nolan, J. E., & Nellans, K. W. (2026). Occurrence of Undiagnosed Diabetes Mellitus With Musculoskeletal Disorders of the Upper Extremity: Prospective Screening With Point-of-Care Haemoglobin A1c Fingerstick Testing. Musculoskeletal Care, 24(3), e70256. https://doi.org/10.1002/msc.70256
• Chung, F., Wong, J., Bellingham, G., Lebovic, G., Singh, M., Waseem, R., Peng, P., George, C. F. P., Furlan, A., Bhatia, A., Clarke, H., Juurlink, D. N., Mamdani, M. M., Horner, R., Orser, B. A., & Ryan, C. M. (2019). Predictive factors for sleep apnoea in patients on opioids for chronic pain. BMJ Open Respiratory Research, 6(1), e000523. https://doi.org/10.1136/bmjresp-2019-000523
• Larsen, D. B., Bendix, L., Abeler, K., Petersen, K. K., Sprehn, M., Bruun, K. D., Blichfeldt-Eckhardt, M. R., & Vaegter, H. B. (2021). Obstructive sleep apnea is common in patients with high-impact chronic pain – an exploratory study from an interdisciplinary pain center. Scandinavian Journal of Pain, 22(1), 106–117. https://doi.org/10.1515/sjpain-2021-0112
• Aaron, R. V., Ravyts, S. G., Carnahan, N. D., Bhattiprolu, K., Harte, N., McCaulley, C. C., Vitalicia, L., Rogers, A. B., Wegener, S. T., & Dudeney, J. (2025). Prevalence of Depression and Anxiety Among Adults With Chronic Pain: A Systematic Review and Meta-Analysis. JAMA Network Open, 8(3), e250268. https://doi.org/10.1001/jamanetworkopen.2025.0268
• Sembrano, J. N., & Polly, D. W. (2009). How often is low back pain not coming from the back? Spine (Phila Pa 1976), 34(1), E27-E32. https://doi.org/10.1097/BRS.0b013e31818b8882
• Okike, K., Peter-Bibb, T. K., Xie, K. C., & Okike, O. N. (2016). Association Between Physician Online Rating and Quality of Care. Journal of Medical Internet Research, 18(12), e324. https://doi.org/10.2196/jmir.6612
• Neprash, H. T., Everhart, A., McAlpine, D., Smith, L. B., Sheridan, B., & Cross, D. A. (2021). Measuring Primary Care Exam Length Using Electronic Health Record Data. Medical Care, 59(1), 62–66. https://doi.org/10.1097/MLR.0000000000001450
• Tai-Seale, M., McGuire, T. G., & Zhang, W. (2007). Time allocation in primary care office visits. Health Services Research, 42(5), 1871–1894. https://doi.org/10.1111/j.1475-6773.2006.00689.x
• Robinson, M. E., Brown, J. L., George, S. Z., Edwards, P. S., Atchison, J. W., Hirsh, A. T., Waxenberg, L. B., Wittmer, V., & Fillingim, R. B. (2005). Multidimensional success criteria and expectations for treatment of chronic pain: the patient perspective. Pain Medicine, 6(5), 336–345. https://doi.org/10.1111/j.1526-4637.2005.00059.x
• Serbic, D., & Pincus, T. (2014). Diagnostic uncertainty and recall bias in chronic low back pain. Pain, 155(8), 1540–1546. https://doi.org/10.1016/j.pain.2014.04.030

Related reading

• Lumbar Fusion Success Rate: What to Measure Before You Decide
• Nerve Pain After Knee Replacement: What Testing Can and Cannot Show
• Laboratory Panels

Lumbar Fusion Success Rate: What to Measure Before You Decide

There is no single lumbar fusion success rate: trials count pain, walking distance, return to work or avoiding a second operation, over different spans of years. How the years after surgery go also depends on your own condition, such as hemoglobin A1c and fat mass, which is why those are worth measuring before surgery is booked.

A surgical proposal usually arrives with an image of the spine and little else. How you do after an operation often depends on the part of you that image never showed.

Search for a lumbar fusion success rate and you will find a percentage, but the trials behind that figure measure success in different ways, over different spans of years, in different people. The video for Chapter 18 of The Pained Brain, by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD, opens with a sixty-six-year-old woman with a slipped lower vertebra who could manage about two hundred yards on foot before her legs grew heavy, holding a proposal for decompression and fusion. The measurement question: what success means, what the spine image leaves out, and which measurements of your own body belong in the decision. Every study is listed in the book companion for Chapter 18.

How is the success rate of lumbar fusion surgery measured?

Researchers comparing treatments often score health on a scale where a year in full health counts as 1 and a year at half of full health counts as half. On that scale, American adults aged 65 to 74 average 0.824. In a Danish national catalog, people with chronic back pain averaged 0.619. Patients in Singapore waiting for degenerative lumbar spine surgery averaged 0.43, and 93.6 percent of them reported pain or discomfort. That gap is why restored function matters so much: a treatment that moves you back toward your age group gives back a large share of every year. It is also why a success rate means little until you know what was counted. Pain scores, walking distance, return to work and avoiding a second operation are four different outcomes, and a single percentage usually reports one of them.

Does lumbar fusion surgery still help years later?

The Spine Patient Outcomes Research Trial is the largest trial of spine surgery run so far. In its degenerative spondylolisthesis group, people who had surgery were still better on every primary measure at eight years. In its stenosis group the picture changed with time: the surgical advantage from the first two years shrank by about 75 percent in years three and four, and by year eight no significant effect of surgery remained. Many patients also crossed over, so that 70 percent of those assigned to surgery and 52 percent of those assigned to non-operative care had been operated on by then.

Later trials tested the fusion itself. In Sweden, 247 patients with stenosis, about half with a slipped vertebra, did about as well with decompression alone, and 22 percent of fused against 21 percent of unfused patients had another operation over roughly six and a half years. A Norwegian trial found decompression without fusion no worse for spondylolisthesis: 71.4 percent against 72.9 percent reached a meaningful improvement. One American trial favored fusion, with fewer reoperations, 14 percent against 34 percent, alongside more blood loss and longer hospital stays. Ask what the fusion is expected to add for your slip, separate from the decompression.

What happens in the years after a lumbar fusion?

A surgical plan describes the operation; the person lives the years after it. In a study of 725 injured workers after lumbar fusion, 26 percent had returned to work at two years compared with 67 percent of similar workers treated without surgery; 27 percent needed a second operation, and 36 percent had a complication. In British records, 20.8 percent of patients met the definition of persistent pain after lumbar surgery. In a nationwide sample, 18.4 percent of people had another operation within ten years of a first stenosis surgery. None of these figures says an operation is wrong for you. They say success has to be measured over years, and that the condition of the person who arrives at surgery shapes how those years go.

What the spine image does not show

Her records held no hemoglobin A1c, the three-month average of blood sugar, because nobody had ordered one. When it was finally measured, it was 6.4. That is the terrain under the slipped vertebra, and it has two biological parts: insulin resistance with the metaflammation that travels with it, and fat mass. In 678 fusions for degenerative spondylolisthesis, age stopped predicting medical complications once other factors were adjusted, while anesthesia risk score and body mass index did. The third driver is the order in which care happens. Among 5,239 older adults with new back pain, early imaging brought no better disability at a year, and among 373,717 veterans, starting with an opioid rather than physical therapy came with 1.69 times the odds of spine surgery within a year.

Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service. It does not read spine images, perform procedures or recommend surgery, and its findings go to your physician. It can fill three gaps:

• Laboratory panels that include blood sugar and insulin markers, so the metabolic side of the decision is on paper. The pattern is explained in insulin resistance and metabolic health.
• Bioimpedance body composition, which separates fat from muscle instead of relying on body mass index alone.
• An ankle-brachial index, which compares blood pressure at the ankle and the arm. When walking distance is the complaint, a record of leg circulation belongs next to the spine image; leg pain when you walk explains why.

An order that keeps the option open

The book’s order is least destructive first: blood work before the scan, a diagnostic block before a burn, a bridge before a fusion. For the woman in the video, a diagnostic block at the slipped level was positive, and two injections each gave her about ten weeks. In those weeks she walked, first four hundred yards and then a mile, while her insulin came down and her sleep returned. The bridge has evidence behind it, with limits the book states itself: most injection studies come from the physicians who perform them, and trials of early conservative care are mixed. In a British sciatica trial, 59 percent of patients randomized to a transforaminal injection never went on to the microdiscectomy, and pooled trials suggest a third to a half of surgical candidates who receive an epidural avoid the operation, on low-level evidence.

Some problems do not wait. New bladder or bowel changes with back pain can signal cauda equina syndrome, where decompression within 48 hours roughly doubles the odds of bladder recovery, and those patients go to a surgeon the same week. For everyone else, the measurements you bring to a surgical consultation are what let you judge success later. A number on a chart standing in for the person is the same trap described in what an MME total leaves out.

Questions to bring before surgery is scheduled

• How will success be measured for me, and at what point in time?
• What does the fusion add beyond the decompression for my particular slip?
• Have my hemoglobin A1c and fasting insulin been checked?
• Has my body composition been measured, or only my weight?
• Has my leg circulation been checked, given that walking is the limit?
• Do I have any sign, such as bladder or bowel change, that makes this urgent?

Asking is not refusing surgery. It makes sure the decision, whichever way it goes, rests on measurements of you and not only on a picture of your spine.

Frequently asked questions

References

• Abdu, W. A., Sacks, O. A., Tosteson, A. N. A., Zhao, W., Tosteson, T. D., Morgan, T. S., Pearson, A., Weinstein, J. N., & Lurie, J. D. (2018). Long-Term Results of Surgery Compared With Nonoperative Treatment for Lumbar Degenerative Spondylolisthesis in the Spine Patient Outcomes Research Trial (SPORT). Spine, 43(23), 1619–1630. https://doi.org/10.1097/BRS.0000000000002682
• Lurie, J. D., Tosteson, T. D., Tosteson, A., Abdu, W. A., Zhao, W., Morgan, T. S., & Weinstein, J. N. (2015). Long-term outcomes of lumbar spinal stenosis: eight-year results of the Spine Patient Outcomes Research Trial (SPORT). Spine, 40(2), 63–76. https://doi.org/10.1097/BRS.0000000000000731
• Försth, P., Ólafsson, G., Carlsson, T., Frost, A., Borgström, F., Fritzell, P., Öhagen, P., Michaëlsson, K., & Sandén, B. (2016). A Randomized, Controlled Trial of Fusion Surgery for Lumbar Spinal Stenosis. The New England Journal of Medicine, 374(15), 1413–1423. https://doi.org/10.1056/NEJMoa1513721
• Austevoll, I. M., Hermansen, E., Fagerland, M. W., Storheim, K., Brox, J. I., Solberg, T., Rekeland, F., Franssen, E., Weber, C., Brisby, H., Grundnes, O., Algaard, K. R. H., Böker, T., Banitalebi, H., Indrekvam, K., & Hellum, C. (2021). Decompression with or without Fusion in Degenerative Lumbar Spondylolisthesis. The New England Journal of Medicine, 385(6), 526–538. https://doi.org/10.1056/NEJMoa2100990
• Ghogawala, Z., Dziura, J., Butler, W. E., Dai, F., Terrin, N., Magge, S. N., Coumans, J. V., Harrington, J. F., Amin-Hanjani, S., Schwartz, J. S., Sonntag, V. K., Barker, F. G., & Benzel, E. C. (2016). Laminectomy plus Fusion versus Laminectomy Alone for Lumbar Spondylolisthesis. The New England Journal of Medicine, 374(15), 1424–1434. https://doi.org/10.1056/NEJMoa1508788
• Nguyen, T. H., Randolph, D. C., Talmage, J., Succop, P., & Travis, R. (2011). Long-term outcomes of lumbar fusion among workers’ compensation subjects: a historical cohort study. Spine, 36(4), 320–331. https://doi.org/10.1097/BRS.0b013e3181ccc220
• Weir, S., Samnaliev, M., Kuo, T. C., Ni Choitir, C., Tierney, T. S., Cumming, D., Bruce, J., Manca, A., Taylor, R. S., & Eldabe, S. (2017). The incidence and healthcare costs of persistent postoperative pain following lumbar spine surgery in the UK: a cohort study using the Clinical Practice Research Datalink (CPRD) and Hospital Episode Statistics (HES). BMJ Open, 7(9), e017585. https://doi.org/10.1136/bmjopen-2017-017585
• Jarvik, J. G., Gold, L. S., Comstock, B. A., Heagerty, P. J., Rundell, S. D., Turner, J. A., Avins, A. L., Bauer, Z., Bresnahan, B. W., Friedly, J. L., James, K., Kessler, L., Nedeljkovic, S. S., Nerenz, D. R., Shi, X., Sullivan, S. D., Chan, L., Schwalb, J. M., & Deyo, R. A. (2015). Association of early imaging for back pain with clinical outcomes in older adults. JAMA, 313(11), 1143–1153. https://doi.org/10.1001/jama.2015.1871
• Wilby, M. J., Best, A., Wood, E., Burnside, G., Bedson, E., Short, H., Wheatley, D., Hill-McManus, D., Sharma, M., Clark, S., Baranidharan, G., Price, C., Mannion, R., Hutchinson, P. J., Hughes, D. A., Marson, A., & Williamson, P. R. (2021). Surgical microdiscectomy versus transforaminal epidural steroid injection in patients with sciatica secondary to herniated lumbar disc (NERVES): a phase 3, multicentre, open-label, randomised controlled trial and economic evaluation. The Lancet Rheumatology, 3(5), e347–e356. https://doi.org/10.1016/S2665-9913(21)00036-9
• Najjar, E., Egu, C., Akil, H., Najjar, S., AlAchkar, M., Muscogliati, R., Daquino, D., Komaitis, S., & Grevitt, M. (2026). Reassessing the clock in cauda equina syndrome: a systematic review and meta-analysis of surgical timing and outcomes. Spine J, 26(9), 1653–1670. https://doi.org/10.1016/j.spinee.2026.04.013

Related reading

• What Is MME? The Number on Your Chart and What It Misses
• Questions to Ask a Pain Management Doctor About Your Numbers
• Laboratory Panels

Blind Injection Accuracy: What a Failed Shot Does and Doesn’t Prove

Blind injection accuracy is lower than most patients assume: needles placed by feel reached the knee joint 72.8 percent of the time and the sacroiliac joint 22 percent. A shot that brought no relief may simply have missed its target, which proves neither that the treatment failed nor that you are a poor responder.

When a shot does nothing, the chart records a failed treatment, not a missed target. Before a bigger procedure gets booked, it is worth knowing which one happened and what else in your body was never measured.

You had the injection, felt little or nothing, and were told the shots do not work for you. Blind injection accuracy is the part of that story nobody wrote down: whether a needle placed by feel ever reached the structure it was aimed at. The video above, Injecting Blindly Is Accepting Failure, covers chapter 13 of The Pained Brain by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD, and every study behind it is laid out in the book’s companion for chapter 13. The question here is narrower: what was measured before the needle went in, what was not, and which of those gaps you can ask someone to close.

How accurate are blind injections?

Surgeons scoped 162 knees immediately after a landmark-guided injection and checked where the needle tip sat. It was inside the joint 72.8 percent of the time, ranging from 53.2 percent for the least experienced injectors to 87.0 percent for the most experienced. The shoulder does worse. Pooled comparisons put the sheath around the biceps tendon, at the front of the shoulder, at 86.7 percent with ultrasound and 26.7 percent by feel. At the sacroiliac joint, low in the back, a blind needle landed inside the joint 22 percent of the time.

None of those figures describes a careless physician. They describe the ceiling on a hand working through skin it cannot see past.

Why didn’t my steroid shot work?

Among 106 consecutive blind shoulder injections, accuracy was 64.7 percent from the front and 45.7 percent from the back, and the physicians could not predict which of their own injections had landed. In people with inflamed joints, a trainee holding an ultrasound probe was accurate in 83 percent of joints, while senior rheumatologists relying on touch managed 66 percent, and only the probe users could judge their own accuracy.

That is a measurement problem in its purest form. One unrecorded variable, where the needle went, is quietly replaced by a recorded conclusion, that the treatment failed. The next rung of the ladder then gets built on that conclusion: a bigger procedure, a surgical consult, a note calling you a poor responder. A steroid blurs the picture further, because it spreads through tissue and can help from a near miss. A diagnostic block cannot hide that way. Its only job is to answer which structure hurts, and an answer from the wrong address is no answer.

Your body changes where the needle lands

A landmark is a map drawn on skin, and the map assumes an average body. In the scoped knee series, accuracy fell in patients with a body mass index of 30 or more. For needles in the lower spine, the line across the top of the hip bones that is supposed to mark the fourth lumbar space was correctly placed in 75.3 percent of people overall but in only 34 percent of people with obesity.

Body mass index is a blunt instrument for describing that body. It divides weight by height and cannot tell muscle from fat or say where the fat is stored. Bioimpedance body composition uses a small, painless electrical signal to estimate fat mass, lean mass and body water. It will not tell anyone where a needle should go; only imaging does that. What it does is replace one weight number with the compartments that number hides, which matters again after the procedure, when muscle has to carry the load. Why body composition tells you more than BMI is worth reading before any visit where your weight comes up.

What a standard pain visit measures, and what it leaves out

A typical referral for an injection carries a pain score, an exam and often a scan. Measura [Cardiometabolic and Autonomic Health Analysis] does not perform injections or imaging, and it does not treat anything. It measures the body a procedure lands in, and the findings go to your physician. That matters because an injection is only a bridge: whatever relief it gives is borrowed time and mobility, and what gets built in that window depends on terrain nobody put on the order form.

Three drivers sit under that terrain. The first is insulin resistance, the metabolic soil the book argues chronic pain grows in, with the low-grade, never-finished inflammation it calls metaflammation. The second is how fat and muscle are distributed, which decides how well a joint or tendon bears load once the pain quiets. The third is not biological. Referral pathways move a patient to the next procedure far more reliably than they move anyone to take a second look at the person, so the parts nobody measured stay unmeasured.

Measura’s laboratory panels put numbers on the metabolic side. If the pain is burning or tingling in the feet rather than a deep ache in one joint, sudomotor testing looks at sweat-gland function run by the small nerve fibers of the hands and feet, which is a different question from the one a joint injection asks. The page on numbness, burning and tingling explains when that question applies, and chronic pain and metabolic health explains why pain and metabolism belong in one conversation.

What should I ask my doctor after an injection fails?

• Was my last injection done under imaging? If it was not, nobody knows whether it reached the target, and the failure may belong to the needle rather than to you.
• If a diagnostic block is planned, will it be imaged, and will I be awake? Sedation inflates the rate of positive blocks, and the block depends on your honest report.
• What is my body composition, not just my weight? Fat and lean mass are separate numbers, and they move separately.
• What do my metabolic labs show as numbers? A result filed as normal is still a value that can be followed over time. What insulin resistance looks like before diabetes shows why the trend matters.
• What is the plan for the weeks of relief? A bridge with nothing built on the far side is a pause, not a treatment.

Unmeasured is unmanaged

The honest complication cuts against a tidy story. Image guidance has not beaten blind injection in every steroid trial, because steroid still works from a near miss, and novices in one cadaver study needed about 28 supervised attempts before they could reliably see a needle with a probe. Precision is a learned skill, not a gadget you buy.

Measurement works the same way. A body composition reading, a lab panel or a nerve-function test fixes nothing by itself. What it does is stop a guess from being filed as a fact. A missed needle recorded as a failed patient is a guess in disguise, and so is a metabolic picture nobody ever drew. You are allowed to ask for both to be seen. Physicians weighing where this fits in a referral workflow can read the clinical version for practices.

Frequently asked questions

References

• Altuntas, Y., Ipek, E., Balkanlı, B., Alibakan, G., & Eren, O. T. (2026). Arthroscopic Assessment of Landmark-Guided Knee Injection Accuracy: A Prospective Observational Study. American Journal of Physical Medicine & Rehabilitation. Epub ahead of print, 2026-06-05. https://doi.org/10.1097/PHM.0000000000003057
• Aly, A.-R., Rajasekaran, S., & Ashworth, N. (2015). Ultrasound-guided shoulder girdle injections are more accurate and more effective than landmark-guided injections: a systematic review and meta-analysis. British Journal of Sports Medicine, 49(16), 1042–1049. https://doi.org/10.1136/bjsports-2014-093573
• Tobola, A., Cook, C., Cassas, K. J., Hawkins, R. J., Wienke, J. R., Tolan, S., & Kissenberth, M. J. (2011). Accuracy of glenohumeral joint injections: comparing approach and experience of provider. Journal of Shoulder and Elbow Surgery, 20(7), 1147–1154. https://doi.org/10.1016/j.jse.2010.12.021
• Cunnington, J., Marshall, N., Hide, G., Bracewell, C., Isaacs, J., Platt, P., & Kane, D. (2010). A randomized, double-blind, controlled study of ultrasound-guided corticosteroid injection into the joint of patients with inflammatory arthritis. Arthritis and Rheumatism, 62(7), 1862–1869. https://doi.org/10.1002/art.27448
• Malik, M., & Ismail, S. (2019). Accuracy of Tuffier’s Line Identification by Palpation Method: Cross-Sectional Comparative Study Among Obese, Pregnant and Control Groups. Turkish Journal of Anaesthesiology and Reanimation, 48(2), 108–114. https://doi.org/10.5152/TJAR.2019.82346
• Rosenberg, J. M., Quint, T. J., & de Rosayro, A. M. (2000). Computerized tomographic localization of clinically-guided sacroiliac joint injections. The Clinical Journal of Pain, 16(1), 18–21. https://doi.org/10.1097/00002508-200003000-00004
• Barrington, M. J., Wong, D. M., Slater, B., Ivanusic, J. J., & Ovens, M. (2012). Ultrasound-guided regional anesthesia: how much practice do novices require before achieving competency in ultrasound needle visualization using a cadaver model. Regional Anesthesia and Pain Medicine, 37(3), 334–339. https://doi.org/10.1097/AAP.0b013e3182475fba
• Hurley, R. W., Adams, M. C. B., Barad, M., Bhaskar, A., Bhatia, A., Chadwick, A., Deer, T. R., Hah, J., Hooten, W. M., Kissoon, N. R., Lee, D. W., Mccormick, Z., Moon, J. Y., Narouze, S., Provenzano, D. A., Schneider, B. J., van Eerd, M., Van Zundert, J., Wallace, M. S., … Cohen, S. P. (2022). Consensus practice guidelines on interventions for cervical spine (facet) joint pain from a multispecialty international working group. Regional Anesthesia and Pain Medicine, 47(1), 3–59. https://doi.org/10.1136/rapm-2021-103031

Related reading

• Polypharmacy and Chronic Pain: What Your Medication List Measures
• Insulin Resistance and Tendon Pain: What Your Numbers Can Show
• Bioimpedance Body Composition

Cluster Headache Misdiagnosis: The Measurement No Scan Can Make

Cluster headache is usually mistaken for migraine, sinus or dental trouble, and the average wait for the right name is 10.43 years. No scan identifies it; three questions do: how intense the pain is, how long an attack lasts, and whether tearing, a red eye, a drooping eyelid or a running nostril appear on the same side.

The worst headache in medicine leaves nothing on a sinus film, a dental X-ray or a blood draw. The instrument that identifies it is a short set of questions, and most people who have it were never asked.

Cluster headache misdiagnosis is not an occasional accident; it is the usual path. Pooled across 22 studies and 8,654 patients, the average time from a first attack to the correct name is 10.43 years, and those years tend to fill up with dental work, sinus treatment and a migraine label that never quite fit. The Chapter 11 video of The Pained Brain, by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD, calls this the most painful headache in medicine. The measurement question underneath it is simpler: what would have identified it in the first year?

Why is cluster headache so often misdiagnosed?

Cluster headache is uncommon, roughly one person in a thousand over a lifetime, and its attacks are brutal and brief: 15 to 180 minutes, up to eight a day, locked to one side of the head. Respondents who fit the diagnostic criteria, 1,604 of them, scored the average attack 9.7 out of 10, higher than the scores the same people gave labor, pancreatitis and kidney stones. Something that severe should be hard to miss. It gets missed because nothing about it appears on the tests people are usually sent for.

Two biological systems explain why. The timing comes from the hypothalamus, the brain’s internal clock, which is why attacks so often land at the same hour of the night and in the same season. The pain and the weeping eye travel a reflex through the trigeminal nerve and a small knot of nerve cells behind the nose called the sphenopalatine ganglion. A clock and a reflex leave no mark on a sinus film, a dental X-ray or a routine blood panel, and by the time anyone looks, the attack has already ended.

What is cluster headache commonly mistaken for?

People with one-sided face pain, a running nostril and a watering eye tend to be routed by where it hurts. In a nationwide Dutch survey, 34 percent had first consulted a dentist and 33 percent an ear, nose and throat specialist. In an Italian and Eastern European series of 144 patients, 77 percent were misdiagnosed at the first consultation and collected 2.27 diagnoses apiece, most often trigeminal neuralgia, migraine or sinusitis. In a Portuguese series, 14.1 percent had undergone dental procedures before the real disorder was named.

The third driver is the system itself. Among 218 family and emergency physicians surveyed, only 15 percent considered themselves adequately informed about the disorder, and 92.9 percent of the emergency physicians said they place these patients in the lowest-acuity zone. For commercially insured American adults, the mean wait for a new neurology visit is 49.7 days, median 25, so a six-week bout can be finished before the specialist appointment arrives. Access, not biology, sets the pace.

What questions identify cluster headache?

The most accurate instrument for this disorder is not a machine. One validated tool, the Erwin Test for Cluster Headache, asks three things: how intense the pain is, how long an attack lasts, and whether autonomic signs show up on the same side as the pain, such as tearing, a red eye, a drooping eyelid, or a running or blocked nostril. In its validation study it identified cluster headache with 84 percent sensitivity and 89 percent specificity. It was built in a specialty setting with extra cluster patients recruited on purpose, so it will perform less sharply in a general clinic. Even so, it is three questions most people with this disease have never been asked.

Why migraine-like symptoms throw the answer off

Many people hear the word migraine because they feel sick or light-sensitive during an attack. Those features do not settle anything. In an international questionnaire of 1,604 people meeting cluster criteria, 50.1 percent reported light or sound sensitivity and 27.5 percent nausea or vomiting, yet 99.0 percent had at least one autonomic sign and 96.6 percent were restless. Restlessness is the useful contrast: people in a cluster attack pace, rock or cannot stay still.

Women are misrouted most often. In a Chinese registry of 1,206 patients, women more often reported nausea, vomiting and light sensitivity and less often a red eye, which nudges the picture toward migraine. Early onset brings its own delay: among 400 Danish patients, onset before age 20 was followed by a 13.8-year wait for the right diagnosis.

What should you record in a cluster headache log?

Unmeasured is unmanaged, and the measurements that matter most here are ones you can take at home. A dated log gives your physician exactly what the three questions ask for:

• the clock time each attack starts and stops
• which side hurts, and whether it ever switches
• tearing, redness, a drooping eyelid or nostril changes on that side
• whether you had to get up, pace or rock
• how many attacks come in a day, and the weeks or season they arrive in

Add every diagnosis you have been given and every procedure done for head or face pain, dental and sinus work included, along with each treatment tried and how it went. The page on questions worth asking your doctor covers how to open that conversation, and the body-clock side of the story is in why pain keeps its own schedule. Treatment decisions belong with your physician; a good log makes that conversation shorter and more accurate.

What Measura can show, and what it cannot

Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service, and its limit here should be stated exactly. No test in the Measura library diagnoses cluster headache or any other primary headache disorder. That diagnosis is clinical, made by a physician against defined criteria, with the three questions at its center.

What Measura measures is the wider autonomic and cardiovascular picture. Heart rate variability reflects how the nervous system adjusts the spacing between heartbeats, and autonomic nervous system testing looks at how the involuntary nervous system regulates functions such as heart rate and blood pressure across the whole body. Those answer different questions from the one-sided reflex behind a cluster attack, and a result in either direction neither confirms nor excludes the headache. The same honesty applies to heart rhythm: some cluster preventives are started with an electrocardiogram, a separate test ordered by the prescribing physician, and cardiac autonomic reflex tests do not replace it. Any Measura finding goes to your physician. The full study-by-study evidence is in the Chapter 11 companion, and the physician-facing version of this topic is screening for cluster headache in primary care.

Frequently asked questions

References

• Van Obberghen, E. K., Fabre, R., & Lanteri-Minet, M. (2025). Cluster headache diagnostic delay and its predictors: a systematic review with a meta-analysis. The Journal of Headache and Pain, 26(1), 71. https://doi.org/10.1186/s10194-025-02001-7
• Parakramaweera, R., Evans, R. W., Schor, L. I., Pearson, S. M., Martinez, R., Cammarata, J. S., Amin, A. J., Yoo, S. H., Zhang, W., Yan, Y., & Burish, M. J. (2021). A brief diagnostic screen for cluster headache: Creation and initial validation of the Erwin Test for Cluster Headache. Cephalalgia, 41(13), 1298–1309. https://doi.org/10.1177/03331024211018138
• Schor, L. I., Pearson, S. M., Shapiro, R. E., Zhang, W., Miao, H., & Burish, M. J. (2021). Cluster headache epidemiology including pediatric onset, sex, and ICHD criteria: Results from the International Cluster Headache Questionnaire. Headache, 61(10), 1511–1520. https://doi.org/10.1111/head.14237
• Voiticovschi-Iosob, C., Allena, M., De Cillis, I., Nappi, G., Sjaastad, O., & Antonaci, F. (2014). Diagnostic and therapeutic errors in cluster headache: a hospital-based study. The Journal of Headache and Pain, 15(1), 56. https://doi.org/10.1186/1129-2377-15-56
• van Vliet, J. A., Eekers, P. J. E., Haan, J., & Ferrari, M. D. (2003). Features involved in the diagnostic delay of cluster headache. Journal of Neurology, Neurosurgery, and Psychiatry, 74(8), 1123–1125. https://doi.org/10.1136/jnnp.74.8.1123
• Hasirci Bayir, B. R., Nazli, E., & Ulutas, C. (2025). Cluster Headache Management: Evaluating Diagnostic and Treatment Approaches Among Family and Emergency Medicine Physicians. Medicina (Kaunas, Lithuania), 61(3), 437. https://doi.org/10.3390/medicina61030437
• Laffargue, E. K., Van Der Goes, D. N., Wilson, A. M., Parziale, S. D., Sico, J. J., Ney, J. (2026). Neurology Wait Times After Primary Care or Emergency Department Visits Among the Commercially Insured Population in the United States: 2019-2023. Neurology, 106(10), e218008. https://doi.org/10.1212/WNL.0000000000218008
• Frederiksen, H.-H., Lund, N. L. T., Barloese, M. C. J., Petersen, A. S., & Jensen, R. H. (2020). Diagnostic delay of cluster headache: A cohort study from the Danish Cluster Headache Survey. Cephalalgia, 40(1), 49–56. https://doi.org/10.1177/0333102419863030

Related reading

• After an ER Visit for Chronic Pain: What Was Never Measured
• Polypharmacy and Chronic Pain: What Your Medication List Measures
• Heart Rate Variability

After an ER Visit for Chronic Pain: What Was Never Measured

An ER visit for chronic pain measures whether you are in danger tonight: vital signs, a pain score and often an image. It does not measure why you hurt or your metabolic terrain, so in the week after, ask your physician about fasting insulin next to glucose and HbA1c, and body composition.

The emergency room is built to rule out what could kill you tonight. The questions about why you hurt, and what your metabolic terrain is doing, usually leave the building with you, unasked.

An ER visit for chronic pain usually ends with news that should feel better than it does: you are not dying. Your heart, your breathing and perhaps a scan came back acceptable, and you went home with a diagnosis that names the place that hurts. A week later, the pain is still there.

The video above, The ER Will Tell You You’re Not Dying. That Is Not a Diagnosis, is Chapter 10 of The Pained Brain by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD. It follows one long night in the waiting room. The question here is narrower: what the emergency department measured, what it had no way to measure, and what to ask for next.

When should you go to the ER for chronic pain?

Emergency departments are designed to catch the rare catastrophe, and they are good at it. Of 41,320 emergency back-pain patients pooled from 22 studies, 2.5 to 5.1 percent had something needing urgent treatment: a fracture, a cancer, an infection or a squeezed spinal cord. At one Melbourne department reviewing 1,000 consecutive back-pain visits, the signs that most raised the chance of serious spinal disease included numbness in the saddle area, sudden inability to pass urine and loss of anal tone. For any serious cause, fever led by a wide margin.

If you have those signs, go now. If you were sent home and you get worse, with a fever or new weakness, go back. A spinal abscess is the classic miss: among 457 confirmed cases, 71 percent had been seen for a related complaint in the month before.

What does an ER visit for chronic pain actually check?

Every measurement in an emergency room serves one decision: admit, treat now, or send home. Vital signs, a pain score, often an image. Nationally, 39.4 percent of emergency visits for back pain included a plain X-ray, and the average stay ran 236.6 minutes. An observer who shadowed emergency physicians found that about a quarter of their shift minutes, 26.9 percent, went to patients, while 34.1 percent went to the computer.

What you carried home is often a label rather than a cause. In national data representing 164 million adult emergency visits for chest pain, abdominal pain and headache, diagnoses naming an actual pathology fell from 72 percent in 1993 to 63 percent in 2009, while testing grew. Back pain was not part of that sample, but the most common back-pain discharge labels also describe a location. A label is a starting point that somebody else has to pick up. What a test result can and cannot tell you is worth reading with your discharge papers in hand.

What can the ER not measure about chronic pain?

Dr. Padda asks three questions of any persistent pain: which structure, which mechanism, which terrain. The emergency department is not built to answer any of them, and it should not be expected to. Proving that a particular spinal joint is the source takes an image-guided diagnostic block, which is a pain specialist’s procedure. The terrain question is different. It can be put into numbers without a needle in the spine.

Terrain means the metabolic background that keeps a nervous system primed for pain: insulin that runs high for years while glucose stays normal, fat stored around the organs, and the food, sleep and stress patterns that feed both. Fasting insulin does not appear on emergency order sets for back pain, and Dr. Padda knows of no emergency department that draws it for that complaint. It does not change the decision made that night, so it never gets drawn.

That is the gap Measura [Cardiometabolic and Autonomic Health Analysis] addresses. It is a testing service, not a treatment, and results go to your physician.

• Laboratory panels can include fasting insulin next to glucose and HbA1c, the pairing explained in what insulin resistance looks like before diabetes.
• Bioimpedance body composition separates fat from muscle, which a weight and a BMI blend together.

Neither test finds the structure that hurts, and neither replaces a pain evaluation. They answer the question nobody in the waiting room had time to ask. The page on chronic pain and metabolic health explains why that question belongs in a pain workup at all.

What should you do in the week after an ER visit?

Leaving the building does not end the problem. In a New York cohort of 556 people discharged after back pain, seven in ten could not function normally one week later, and nearly half were still impaired three months on. In a second group, people whose pain persisted at the one-week point had 2.42 times the odds of being impaired at three months. The first week is when the course of the next season is still easiest to change.

Many people return to the same room instead. One hospital saw 14 percent of these patients return with the same complaint inside twelve months. Part of that is a missing destination, and emergency physicians say so themselves: when Canadian emergency physicians were surveyed, 96 percent reported no effective chronic-pain pathway in their department and 70 percent said they did not know where to send these patients. The care is not evenly shared either. Pooled American studies found Black patients 40 percent less likely than White patients to be given analgesia for acute pain.

The fault is not the emergency physicians, who rate their own pain care lower than physicians in any other specialty surveyed do. The fault is a system with no door between the waiting room and a plan. A measurement visit in that first week is one way to open it, because a plan built on your own numbers is harder to lose than a phone number on a discharge sheet.

What to ask for after the visit

• Did my discharge diagnosis name a cause, or only where it hurts?
• Which red flags were checked, and were any positive?
• Has anyone measured my fasting insulin, not just my glucose?
• What does my body composition show, apart from my weight?
• Who will see me within a week if this pain is still here?

For help putting those questions in order, see questions worth asking your doctor. The book’s companion lays out every study behind these figures and what each cannot show. If the pain that sent you to the ER spread beyond one spot, what central sensitization symptoms can show in your numbers covers that side.

Frequently asked questions

References

• Galliker, G., Scherer, D. E., Trippolini, M. A., Rasmussen-Barr, E., LoMartire, R., & Wertli, M. M. (2020). Low Back Pain in the Emergency Department: Prevalence of Serious Spinal Pathologies and Diagnostic Accuracy of Red Flags. The American Journal of Medicine, 133(1), 60-72.e14. https://doi.org/10.1016/j.amjmed.2019.06.005
• Shaw, B., Kinsella, R., Henschke, N., Walby, A., & Cowan, S. (2020). Back pain “red flags”: which are most predictive of serious pathology in the Emergency Department? European Spine Journal, 29(8), 1870–1878. https://doi.org/10.1007/s00586-020-06452-1
• Henreid, A. J., Ioannides, K. L. H., Pevnick, J. M., Cohen, T. N., Torbati, S. S., Nuckols, T. K., & Berdahl, C. T. (2026). Quantifying and Visualizing Emergency Physician Workflow: Observational Time-Motion Study. JMIR Medical Informatics, 14, e85983. https://doi.org/10.2196/85983
• Wen, L. S., Espinola, J. A., Kosowsky, J. M., & Camargo, C. A. (2015). Do emergency department patients receive a pathological diagnosis? A nationally-representative sample. The Western Journal of Emergency Medicine, 16(1), 50–54. https://doi.org/10.5811/westjem.2014.12.23474
• Friedman, B. W., O’Mahony, S., Mulvey, L., Davitt, M., Choi, H., Xia, S., Esses, D., Bijur, P. E., & Gallagher, E. J. (2012). One-week and 3-month outcomes after an emergency department visit for undifferentiated musculoskeletal low back pain. Annals of Emergency Medicine, 59(2), 128-133.e3. https://doi.org/10.1016/j.annemergmed.2011.09.012
• Friedman, B. W., Conway, J., Campbell, C., Bijur, P. E., & John Gallagher, E. (2018). Pain One Week After an Emergency Department Visit for Acute Low Back Pain Is Associated With Poor Three-month Outcomes. Academic Emergency Medicine, 25(10), 1138–1145. https://doi.org/10.1111/acem.13453
• Grant, K. L., McParland, A. L., Francispragasam, M., & Oxciano, P. (2023). Referral pathways for chronic pain patients from Canadian emergency departments: emergency physicians’ practices, perspectives, and recommendations. CJEM, 25(9), 761–767. https://doi.org/10.1007/s43678-023-00566-3
• Lee, P., Le Saux, M., Siegel, R., Goyal, M., Chen, C., Ma, Y., & Meltzer, A. C. (2019). Racial and ethnic disparities in the management of acute pain in US emergency departments: Meta-analysis and systematic review. The American journal of emergency medicine, 37(9), 1770–1777. https://doi.org/10.1016/j.ajem.2019.06.014
• Fellner, A., & Kim, H. S. (2025). Usual Care for Low Back Pain at United States Emergency Departments, 2016-2022. Annals of Emergency Medicine, 86(6), 639–645. https://doi.org/10.1016/j.annemergmed.2025.06.005

Related reading

• Central Sensitization Symptoms: What Your Numbers Can Show
• Cluster Headache Misdiagnosis: The Measurement No Scan Can Make
• Laboratory Panels

What happens before your appointment

Before your appointment, your symptoms, history, medications and goals are collected in advance, and you receive preparation instructions: no alcohol for 24 hours, no caffeine or nicotine that morning, and an overnight fast if metabolic rate or laboratory work is in the plan.

Collecting the history beforehand means the appointment itself is spent measuring rather than typing.

What information is collected before your appointment?

• Symptoms, in your own words, and how long they have been going on.
• Past medical history and previous procedures.
• Family history — particularly diabetes, cardiovascular disease, hypertension, stroke and cancer.
• Social history, including alcohol and tobacco.
• Every medication and supplement, with dose and timing.
• What you are hoping the assessment will answer.

That last item shapes the plan more than anything else on the list. How a testing plan is chosen.

What should you tell us before your appointment?

Four in particular, because each one changes what is done.

• A pacemaker, implanted defibrillator or other implanted electrical device. Bioimpedance is generally avoided and the rest of the assessment proceeds normally.
• Pregnancy. Several assessments are adjusted.
• Neck problems, recent eye surgery or retinal disease. Positional balance testing and the controlled-exhale maneuver are adapted or omitted.
• Mobility limitations. Parts of the assessment involve standing from lying down; we plan around it rather than being surprised by it.

How should you prepare for your appointment?

• No alcohol for 24 hours — it changes heart rate variability measurably.
• Keep to your usual sleep, and avoid unusually heavy exercise the day before.
• Fast overnight if metabolic rate measurement or laboratory work is in the plan. Water is allowed and encouraged.
• No caffeine and no nicotine on the morning of the appointment either way.
• Do not stop any medication unless you are specifically told to. Bring the list instead.

What should you bring to your appointment?

Identification and insurance card, the medication and supplement list, any recent laboratory results, your glasses and hearing aids, and the name and address of the clinician who should receive the report. Wear clothing that pushes above the elbow and rolls above the knee, and bring socks you can take off.

Why does test preparation matter so much?

Because a measurement taken under unrecorded conditions cannot be compared with anything. The instructions exist so the number you get today is comparable with the number you get in a year. If you slip up, say so — the answer gets recorded and the result is interpreted accordingly. Full preparation instructions.

Frequently asked questions

How long do I need to fast before my appointment?

Fast overnight if metabolic rate measurement or laboratory work is in your plan. You will be told in your preparation instructions whether it is. Water is allowed and encouraged during the fast. Either way, skip caffeine and nicotine on the morning of the appointment and avoid alcohol for the 24 hours before.

Can I drink coffee before my appointment?

No. Skip caffeine on the morning of the appointment, whether or not you are fasting, and skip nicotine as well. The preparation instructions exist so the number you get today can be compared with the number you get in a year.

Should I take my usual medications before the appointment?

Yes, unless you are specifically told to stop one before the visit. Do not stop any medication on your own. Bring a complete list of every medication and supplement, with dose and timing.

What if I accidentally ate or had coffee before the appointment?

Say so. The answer is recorded and the result is interpreted with it in mind. A measurement taken under unrecorded conditions cannot be compared with anything, so an honest note about what happened that morning is far more useful than a reading that looks clean but is not.

Related reading

• How to prepare
• Directions and parking
• What the appointment feels like

How a testing plan is chosen

Nobody has all fifteen assessments. The panel is built backwards from the question you actually came in with.

How is a testing plan decided?

The first step is working out what question you want answered. That sounds obvious and it is routinely skipped, which is how people end up with a folder of results that does not address the thing that worried them.

Which tests do I need for my symptoms?

What gets added regardless

Height, weight, waist measurement, blood pressure, pulse and oxygen saturation are taken every time, because everything else is interpreted against them. So is the medication and supplement list, which is not administrative box-ticking — several common drug classes change what these measurements show.

What gets left out deliberately

Ordering a panel because it exists is how people end up with an incidental abnormality that generates work and answers nothing. Autoimmune and genomic panels in particular are ordered for a specific clinical question or not at all.

Can the testing plan change on the day of testing?

Sometimes it does. If a vascular study comes back with a strikingly asymmetric result, adding the toe index on both sides matters more than whatever was next on the list. If a metabolic rate measurement is invalidated because someone forgot and had coffee, it is rescheduled rather than reported. The plan is a starting point.

Frequently asked questions

Related reading

• Who should be tested
• The full test library
• How long testing takes

How long does the testing take?

A full assessment occupies most of a morning or an afternoon. A focused one can be under an hour. Which you are having is agreed before you book.

How long does each test take?

How long does a focused panel take?

Most people come in with one question. Numb feet is a vascular study plus sudomotor testing plus a laboratory panel — under an hour of chair time. Leg cramping on walking is the vascular study alone. Unsteadiness is balance testing plus autonomic testing plus a cognitive screen. The full suite is for someone in the risk group who wants a complete baseline, not for everyone who walks in.

How a testing plan is chosen.

Where does the time go during testing?

Two places, and neither is the equipment. The first is rest periods — vascular and autonomic measurements taken on someone who has just hurried in from the parking lot are not the measurements anyone wanted. The second is coaching. A poorly performed breathing maneuver produces a trace that looks exactly like autonomic failure, so the person running the study will take the time to get it right and will repeat it if it is not.

How should you plan the day of testing?

If measured metabolic rate or laboratory work is in your plan, you will be fasting, so an early slot and a plan for breakfast afterward make the morning much more pleasant. If you are traveling from St. Charles County or another part of the region, doing the whole assessment in one visit usually beats splitting it. Directions and travel times.

Can you drive and go back to work after testing?

No sedation, no recovery period, no restriction on activity. You can drive, eat, work and exercise immediately.

Frequently asked questions

How long does a vascular study take?

About 20 minutes, including the rest period that comes first. If leg cramping on walking is your question, the vascular study alone may be all you need. Paired with sudomotor testing and a laboratory panel for numb feet, it is still under an hour of chair time.

How do I prepare for a vascular test?

Give yourself enough time that you are not rushing. Vascular measurements taken on someone who has just hurried in from the parking lot are not the measurements anyone wanted, which is why a rest period comes first. If measured metabolic rate or lab work is in your plan, you will be fasting, so pick an early slot and plan breakfast for afterward.

How long does testing for numb feet take?

Under an hour of chair time. Numb feet calls for a vascular study, sudomotor testing and a laboratory panel. Most people come in with one question like this, and a focused panel built around it is much shorter than the full assessment, which occupies most of a morning or an afternoon.

Related reading

• What to expect at your appointment
• What the appointment feels like
• How to prepare