Can Stress Cause Body Aches? What Chronic Stress Does to Pain

Can stress cause body aches? Yes, and not in the dismissive way that question usually gets answered. Chronic stress changes how your immune cells respond to cortisol, how your brain weighs a pain signal, and how much pressure it takes before a muscle hurts. Those changes show up in blood, on MRI and under a simple pressure gauge.

The video above is Chapter 8 of The Pained Brain, the book by Dr. Gurpreet Singh Padda, MD, MBA, MHP, and Dr. KrisJay Fucanan, MD. Below is the longer version: the studies behind the argument, the ones that complicate it, and what treating a stress system actually involves.

"Just stress" is half a diagnosis

Think of a woman who has cared for a husband with dementia for four years and sleeps upright in a chair. Neck, shoulders, low back, and now burning across both feet. Her scans and blood work are unremarkable, so three physicians called it stress, and each meant it was not real. When I finally measured her pressure-pain thresholds, they were the lowest I had seen that month. She is a composite. The dismissal she heard is not.

In a survey of people with chronic pain, 77 percent said a provider had invalidated their pain, and invalidation tracked with worse physical function. The failure is not naming stress. It is naming the mechanism and then declining to treat it.

Can stress cause body aches? How cortisol flips

Short term, cortisol is the strongest anti-inflammatory you make. When 23 healthy volunteers received bacterial endotoxin, their temperature rose 1.9 degrees and tumor necrosis factor peaked at 155 picograms per milliliter. With the same endotoxin given during a stress-dose hydrocortisone infusion, the fever was 0.8 degrees and tumor necrosis factor could not be detected.

Timing reverses that. In the same experiment, endotoxin given 12 hours or six days after the hydrocortisone produced tumor necrosis factor peaks of 609 and 671, about four times the response of people never exposed. Stretch the exposure across years and cells stop listening. In 33 people caring for a relative with brain cancer, immune cells showed 1.65 times the activity of the inflammatory switch NF-κB and 0.68 times the activity of the cortisol receptor’s gene program, with normal cortisol levels. The hormone was there; the cells had turned it down.

The daily rhythm flattens as well. Cortisol should be high after waking and low at night. Across 80 studies and 36,823 people, a flatter slope went with worse health, most strongly with inflammation, and predicted death at a hazard of 2.40, or 1.63 with two outlier studies removed. That is why a single morning cortisol on a lab slip rarely settles anything.

What the evidence shows in people who already hurt

In the north of England, 267 at-risk adults free of widespread pain had their stress axis tested and were followed. Those whose cortisol failed to suppress after dexamethasone developed chronic widespread pain at 3.53 times the odds, and those with all three abnormalities at 8.5 times. A Dutch cohort of 2,039 adults did not replicate it; what predicted new pain there was the count of adverse life events, 1.14 per event. I give you both because the axis is not a simple dial.

In established pain the pattern is dysregulation in both directions. In 4,560 older English adults, chronic pain went with more hair cortisol at both the low and the high end of the range and no difference in the middle. In fibromyalgia, pooled across 47 studies, salivary and urinary cortisol ran lower than in controls. Too high in some, too low in others, flat in many.

The exposures that predict new pain

This is the strongest evidence that stress reaches tissue. Across 85 studies and 826,452 adults, childhood abuse or neglect raised the odds of adult chronic pain 1.45-fold, graded from 1.29 for one adverse experience to 1.95 for four or more. In 118,347 British adults, childhood maltreatment raised chronic all-over body pain from 4.0 to 6.3 percent, while a control exposure that should not matter, childhood sunburn, barely moved it. Financial hardship at 43 predicted chronic widespread pain at 68, at 4.44 times the relative risk for the most hard-pressed, after adjusting for body mass and psychiatric caseness.

Work and isolation do it too. Among 1,944 healthcare workers free of back pain, high perceived stress predicted new low back pain a year later at 2.67 times the odds. In 315,197 UK Biobank participants, loneliness raised the hazard of new low back pain 1.32-fold, while living alone raised nothing. The feeling carried the risk, not the circumstance, which fits social isolation as an inflammatory state.

Stress rewires the brain, and the rewiring reverses

Among 2,199 randomly sampled Danish adults, high perceived stress went with lower pressure-pain thresholds at the trapezius, the muscle between neck and shoulder. One stressful morning in a lab does not reliably lower thresholds; years of load is a different exposure.

The brain keeps a record. People with chronic back pain had 5 to 11 percent less neocortical gray matter, comparable to 10 to 20 years of aging. In 39 people with new back pain, the strength of one prefrontal-to-reward-center link on the first scan sorted, at 0.83 accuracy, those who still hurt a year on. Among back pain patients, higher cortisol went with a smaller hippocampus.

Here is the part that makes this treatable rather than a sentence. When 10 people with hip arthritis were rescanned after joint replacement left them pain-free, gray matter had increased in four regions within six weeks to four months. In chronic low back pain treated with surgery or facet injections, a thinned prefrontal cortex thickened over six months. Take the signal down long enough and the cortex recovers. That is what a bridge buys. Why a normal scan so often sits beside severe pain is covered in central sensitization explained, and the spinal machinery comes next in the volume knob that is not in the knee.

The stress hormone builds the terrain

Chronic cortisol also shapes the body the pain lives in. Across 10,289 people, ongoing stress raised the cortisol stored in hair by 43 percent, and hair cortisol tracked body mass and waist-to-hip ratio. In 1,604 Dutch adults, higher hair cortisol went with a waist 5.36 centimeters larger and more interleukin-6. Among civil servants followed 14 years, three or more exposures to work stress meant 2.25 times the odds of metabolic syndrome. Visceral fat then regenerates active cortisol inside itself, which turns a stress response into a metabolic loop. That fat behaves like an immune organ that hurts, and the first brain burns with the same fire, as anxiety as a fire in the gut describes.

Treating a dysregulated stress system

None of this replaces the bridge. A patient with a trapezius in spasm and burning feet cannot start a mindfulness course on day one. Trigger-point injections or nerve blocks, when they fit the clinical picture, buy the weeks in which the stress system can be retrained. What an injection cannot do is retrain it.

That work has real numbers attached. In 342 adults with chronic low back pain, eight weeks of mindfulness-based stress reduction produced meaningful improvement in function in 60.5 percent at six months, against 44.1 percent with usual care. In 151 adults with long-standing back pain, four weeks of pain reprocessing therapy left 66 percent pain-free or nearly so, against 20 percent with a placebo injection. The sober side: against an active comparison, cognitive behavioral therapy moved pain intensity by only 0.09. These treat a dysregulated axis. They are not cures, and they buy function more than they erase intensity.

The cheapest lever is light at the right hour. Bright light at waking raises the morning cortisol peak by about 35 percent, restoring the steep curve that flattens under chronic stress. The night is the mirror: adults who slept one night under 100 lux of room light woke with insulin resistance about 15 percent higher. Short experiments have not shown morning light lowering cortisol load or blood sugar within a day or two, so outdoor light within an hour of waking, at the same time daily, plus a dark bedroom, is a cheap bet on the rhythm over weeks. That evidence is graded study by study in the Chapter 8 technical supplement you can hand your physician. The sleep side of the same clock is why pain is worse at night.

Frequently asked questions

Can stress cause pain all over the body?

It raises the risk. In 118,347 adults, childhood maltreatment raised chronic all-over body pain from 4.0 to 6.3 percent, and among 4,229 Danish adults past sexual assault carried 1.89 times the rate of new chronic widespread pain, even with distress and personality accounted for. The route runs through cortisol signaling, inflammation and the brain regions that weigh pain. Why normal test results are expected in fibromyalgia.

Why does stress make my neck and shoulders hurt?

That is where population data locate it. Among 2,199 Danish adults, high perceived stress went with lower pressure-pain thresholds at the upper trapezius, the muscle between neck and shoulder, so less pressure was needed to make it hurt. Laboratory work adds that acute stress switches off descending pain inhibition, especially in people with a strong stress response. How chronic noise keeps you in pain and blocks healing.

Is a cortisol blood test useful for stress-related pain?

A single morning value rarely helps. In chronic pain, cortisol can run high in some people, low in others and flat across the day in many, and the problem often sits at the receptor rather than in the level. What tracks inflammation and mortality is the shape of the daily curve, and one large cohort found no cortisol measure predicted new pain at all. Metabolic inflammation and chronic pain.

Does treating stress actually reduce pain?

For many people, yes, with honest limits. Mindfulness-based stress reduction meaningfully improved function in 60.5 percent of adults with chronic low back pain at six months, and pain reprocessing therapy left 66 percent pain-free or nearly so at four weeks in a community trial. Against active comparisons the effect on pain intensity shrinks, so expect function and distress to improve first. How acceptance and commitment therapy works for traumatic stress.

Can chronic stress change the brain?

It can, and the change can reverse. Chronic back pain has been linked with 5 to 11 percent less neocortical gray matter, childhood maltreatment with a thinner cingulate cortex, and higher cortisol with a smaller hippocampus. After successful hip replacement left 10 patients pain-free, gray matter grew back in four regions within four months. The neurobiology of a stuck alarm.

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Medically reviewed by Dr. Gurpreet Singh Padda, MD, MBA, MHP, board certified in anesthesiology, pain medicine, interventional pain management, addiction medicine and obesity medicine. Adapted from Chapter 8 of The Pained Brain by Dr. Padda and Dr. KrisJay Fucanan, MD. Last reviewed September 2026.

Dr. Gurpreet Singh Padda, MD, MBA, MHP