Belly fat and chronic pain

Can Belly Fat Cause Chronic Pain? What 32,409 MRI Scans Show

Belly fat is tied to chronic pain: in abdominal MRI scans of 32,409 adults, more visceral and subcutaneous fat meant pain in more parts of the body, most strongly in women.

Aching in your back, knees and shoulders at once gets filed under getting older. Large MRI studies point to a different common thread: where your body stores fat.

Can belly fat cause chronic pain? When your back, knees and shoulders all hurt at once, you leave with three explanations, three referrals and the word arthritis. Abdominal MRI scans of 32,409 adults point to one common thread instead: the fat stored deep inside your abdomen rises in step with the number of places that hurt, most of all in women, and a scale cannot see it, though a body composition test gets you closer.

What the MRI study measured

Researchers at the University of Tasmania used the UK Biobank, a long-running British health study, to examine adults who had abdominal MRI scans (50.8% women, average age 55.0). The scans split belly fat into two compartments. Visceral fat sits inside the abdominal wall, packed around the intestines and liver. Subcutaneous fat sits under the skin, the part you can pinch. Participants reported pain in the neck or shoulder, back, hip or knee, or pain all over the body, and many were scanned and questioned again at a second imaging visit.

As each type of fat went up, the count of painful sites went up with it, step by step, in both sexes. Higher levels of adipose tissue were also associated with greater odds of reporting chronic pain in both sexes, not just pain in more places.

Visceral fat, subcutaneous fat and pain in women and men

Women. Each standard-deviation rise in visceral fat came with 2.04 times the odds of pain in more sites. For subcutaneous fat the figure was 1.60.
Men. The odds rose 1.34 times for visceral fat and 1.39 times for subcutaneous fat.

The ratio of visceral to subcutaneous fat tracked pain as well, and the authors attribute the larger effect in women to sex differences in fat storage and hormones. Why the two compartments behave differently is covered in the difference between visceral and subcutaneous fat.

In men, the pinchable fat under the skin carried as much pain risk as the deep fat around the organs. The comfortable story that outer fat is the harmless kind collapses the moment you ask about pain.

This is an observational study, and the arrow runs both ways: pain cuts movement, stillness stores fat, fat feeds pain. What the data demolish is the idea that aching in four places is four separate cases of wear and tear.

Why fat in the belly makes the whole body hurt

A knee carries body weight. A neck does not carry more of it when your waist grows, yet the neck hurt more too. Load cannot explain that. Something traveling in the blood can, and the authors conclude that fat stored where it does not belong is involved in how multisite pain develops.

Two biological drivers run the cascade. The first is fat behaving as an organ. Swollen fat tissue around the abdomen releases inflammatory messengers into the circulation, a steady low-grade fire called metaflammation, and inflamed nerve endings fire at lower thresholds, so ordinary pressure and ordinary movement start to register as pain. The second is insulin. Deep abdominal fat and a fat-loaded liver force the pancreas to pour out more insulin to keep blood sugar normal, and that strained metabolism starves small nerves and slows the repair of muscles and tendons after every day of use.

The third driver is economic, and it is the one nobody writes on a prescription pad. Agricultural subsidies make acellular carbohydrates and industrial seed oils the most available calories in the country, most jobs keep people seated all day, and a person who already hurts moves less and sleeps worse. Every one of those loads the abdominal depot. None of it is a willpower failure. It is a food system and a work system doing exactly what they were built to do. Chronic stress feeds the same depot through its own hormonal loop, traced in how cortisol and belly fat feed each other. The timing of the stress response matters as much as its size, which is where gut bacteria and the daily stress rhythm come in.

What your weight and BMI cannot tell you

A second UK Biobank analysis looked at 500,107 adults aged 40 to 69 and compared ways of describing body fat. Body fat percentage measured by bioimpedance, a small electrical signal passed through the body, correlated with body mass index at 0.85 in women and 0.80 in men. Total fat and body mass index mostly tell the same story. Shape told a different one: waist-to-hip ratio was the only measure still tied to a higher risk of death after full adjustment, 1.21 in women and 1.19 in men when the highest and lowest ends of the range were compared.

A third analysis of abdominal MRI from 33,889 UK Biobank participants linked visceral fat, fat infiltrating the muscles along the spine, and chronic back pain in both sexes. Your scale answers how much. Your pain is answering where. The practical ways to measure the second question are laid out in how to measure visceral fat when the scale says you are fine. Clinicians have a waist-to-weight ratio that flags this depot in older patients with high blood pressure, described in the weight-adjusted waist index and stroke.

What happens to pain when the weight comes off

For years I treated the joint that hurt and handed the waistline a pamphlet. The trial evidence has made that division indefensible. In STEP 9, 407 adults with obesity and painful knee osteoarthritis (81.6% women, average body mass index 40.3) were followed for 68 weeks. Everyone received counseling on physical activity and a reduced-calorie diet; two thirds also received a weekly weight-loss injection and the rest a placebo. Weight fell 13.7% with the drug and 3.2% with placebo. On a pain scale of 0 to 100, pain dropped 41.7 points with the drug and 27.5 points with placebo.

Look hard at the placebo group: a modest loss on counseling alone, and their pain still fell. The people who lost the most weight hurt the least. Nothing here is a reason to start or stop any medication; that decision belongs to you and your physician.

No trial has yet tested whether shrinking visceral fat eases pain in several body sites, because trials enroll one diagnosis at a time and screen out the person with metabolic disease, obesity and pain in four places, the exact person the MRI study describes. The mechanism has to carry the decision. Movement, sleep and food are treatment, each with a physiological why: contracting muscle pulls sugar out of the blood without extra insulin, deep sleep lowers the inflammatory tone that sensitizes nerves, and cutting acellular carbohydrates lowers the insulin load that locks fat in the abdominal depot. The fat that drives pain is also tied to cancer risk, laid out in how weight and metabolic dysfunction connect to cancer.

What measurement can show

Measura [Cardiometabolic and Autonomic Health Analysis] is a testing service. It measures, it does not treat, and results go to your physician. It does not perform MRI; imaging that separates visceral from subcutaneous fat is done elsewhere. What Measura adds in the same person:

Bioimpedance body composition estimates fat mass and muscle mass separately. It cannot isolate visceral fat, but repeat tests show whether you are losing muscle while keeping fat.
Laboratory panels can include fasting insulin and high-sensitivity C-reactive protein, the metabolic and inflammatory output of that fat, which a glucose-only panel never sees.

How pain and metabolism connect in everyday care is covered in chronic pain and metabolic health. Unmeasured is unmanaged, and a pain nobody traces to its terrain gets managed forever.

What to ask at your next visit

Has anyone measured where my fat sits, or only what I weigh?
Can my blood work include fasting insulin and an inflammation marker, not just glucose?
If I lose weight, how will we know whether it came from fat or from muscle?

More questions worth bringing are in questions to ask a pain management doctor about your numbers, and holding on to a loss once it happens is covered in how to maintain weight loss when the scale stops telling the truth.

Frequently asked questions

Is visceral fat worse than the fat I can pinch?

For heart and metabolic risk, deep visceral fat carries more weight. For pain, the MRI study found both matter: in women visceral fat had the stronger link, while in men the fat under the skin was linked to pain as strongly as the fat around the organs. Neither kind can be judged from a scale reading. Visceral fat vs subcutaneous fat: what testing can show explains the difference in more detail.

Why would belly fat make my neck or shoulders hurt?

Abdominal fat does not press on your neck, which is why the explanation lives in the blood. Inflammatory messengers released from swollen fat tissue make nerves more sensitive throughout the body, so pain shows up far from the fat itself. When the nervous system turns up its volume like this, the pattern has its own name, covered in central sensitization symptoms and what your numbers can show.

Can chronic stress add belly fat and pain at the same time?

Stress hormones push fat storage toward the middle, and poor sleep and constant pain raise the stress load further, so the two problems feed each other. The waist and the blood fats record that loop faithfully. The mechanism is explained in cortisol and belly fat: what chronic stress leaves you can measure.

Does a normal blood sugar mean my metabolism is fine?

Not necessarily. Blood sugar can stay in range for years while the pancreas makes more and more insulin to hold it there, and that high insulin is part of what keeps abdominal fat stored. A fasting insulin level alongside glucose and hemoglobin A1c shows the problem years earlier. Why that matters when you hurt is covered in what a normal A1c can hide when you hurt.

Can a scale show whether I lost the right kind of weight?

A scale reports one total. It cannot tell you whether the pounds that left were fat or muscle, and losing muscle while keeping abdominal fat can leave pain and metabolism untouched even as the number drops. Body composition testing splits that total into its parts and can be repeated to show a trend. The reasoning is laid out in body composition is not the same as weight.

Find out where your body stores fat

Ask about body composition and metabolic blood work so your physician can see what a scale reading leaves out. Request testing through Measura.

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References

Kifle, Z. D., Tian, J., Aitken, D., Melton, P. E., Cicuttini, F., Jones, G., & Pan, F. (2026). MRI-derived abdominal adipose tissue is associated with multisite and widespread chronic pain. Regional Anesthesia and Pain Medicine, 51(4), 371-378. https://doi.org/10.1136/rapm-2024-105535
Wiebe, N., & Tonelli, M. (2025). Associations of body fat and inflammation with non-communicable chronic diseases and mortality: a prospective cohort study of the UK Biobank. BMJ Open, 15(10), e092962. https://doi.org/10.1136/bmjopen-2024-092962
Niglas, M., Whitcher, B., Amiras, D., Thanaj, M., Basty, N., Bell-Bradford, C., Thomas, E. L., & Bell, J. D. (2026). Detecting scoliosis at scale using automated cobb angle analysis in the UK biobank. European Spine Journal. https://doi.org/10.1007/s00586-026-10239-1
Bliddal, H., Bays, H., Czernichow, S., Uddén Hemmingsson, J., Hjelmesæth, J., Hoffmann Morville, T., Koroleva, A., Skov Neergaard, J., et al. (2024). Once-weekly semaglutide in persons with obesity and knee osteoarthritis. The New England Journal of Medicine, 391(17), 1573-1583. https://doi.org/10.1056/NEJMoa2403664