Lower Back Pain But Nothing Wrong on Tests?

Published March 3, 2026 · 6 min read

By Tauri Urbanik, Pain Science Researcher

Your back hurts. Your scans look fine. Now what?

You went to the doctor because your lower back pain would not let up. Weeks. Months. Maybe longer. They ordered imaging. Maybe blood work too.

And the results came back: nothing significant. Maybe "mild degenerative changes" or "slight disc bulge." But nothing that explains why you can barely tie your shoes some mornings.

So here you are. In real pain. With test results that say there is nothing to find. It feels like a dead end. But it is actually a breakthrough.

The 85% number that changes everything

Here is a fact that would surprise most people. About 85% of chronic lower back pain is classified as "non-specific." That is the medical term for "we cannot find a structural cause."

Not 10%. Not 30%. Eighty-five percent. The vast majority of people with chronic lower back pain have nothing structurally wrong with their spine.

And here is the even more surprising part. Researchers scanned over 3,000 people with zero back pain (Brinjikji et al., AJNR, 2015↗). What they found shocked the medical community.

Half of all pain-free 40-year-olds had disc bulges. At age 60, over 90% had disc degeneration. At age 80, 96%. All with zero pain.

Disc bulges and degeneration are not diseases. They are normal age-related changes. Like wrinkles or gray hair. The difference is that nobody sees wrinkles on their scan and panics.

So what IS causing your back pain?

If your spine is structurally sound, and in most cases it is, then where is the pain coming from?

Your brain.

Not in a "it is all in your head" way. In a neuroscience way. Your brain has learned to produce pain signals in your lower back even though there is no damage there. Researchers call this neuroplastic pain.

Brain imaging studies show that chronic back pain patients have measurably different brain activity than people with acute injuries. Over time, pain processing shifts from the body's sensory circuits to the brain's emotional and danger-detection circuits (Hashmi et al., Brain, 2013↗). The pain has literally moved from your spine to your brain.

How back pain gets stuck

Here is how it usually goes. Something triggers your first episode of back pain. Maybe you lifted something. Maybe you slept wrong. Maybe there was no clear trigger at all.

Your brain produced pain to protect you. That is normal. Helpful, even.

But then something went wrong. The original trigger resolved. Your tissues healed. But your brain kept sending the pain signal. It learned a pattern and got stuck in it.

And fear made it worse. You started worrying about your back. Avoiding certain movements. Bracing yourself. That fear told your brain there was more danger. So it produced more pain. A cycle.

The study that proved back pain is reversible

In 2022, researchers at the University of Colorado published a study that changed how we think about chronic back pain (Ashar et al., JAMA Psychiatry, 2022↗). They took 151 chronic back pain patients and treated them with Pain Reprocessing Therapy, a brain-based approach.

After just four weeks, 66% were pain-free or nearly pain-free. And the results held at one-year follow-up. These were not people with mild discomfort. They had been in pain for years.

The treatment did not touch their spines. It retrained their brains.

T

Tom, 45

lower back pain for 9 years

Tom's lower back pain started at 36. His MRI showed a mild disc bulge, but his doctor said it was unremarkable. PT helped a little. Injections helped for a few weeks. Nothing lasted. When he learned that 50% of pain-free people his age have the same disc bulges, something clicked. His disc was not the problem. His brain was stuck in a pain loop. Within six weeks of brain retraining, his pain dropped from a daily 7 to a 2. Some days it disappeared completely.

Composite story based on common patient patterns. Not a specific individual.

Nothing wrong means everything is possible

A normal scan is not a dead end. It is a green light. It means your lower back is structurally sound. There is nothing to surgically fix because there is nothing broken.

What needs to change is happening in your brain. And brains are remarkably good at changing. That is what neuroplasticity means. Your brain learned this pain pattern. It can unlearn it.

The first step is understanding what is going on. You are already doing that.

Frequently asked questions

Why does my lower back hurt if nothing is wrong on tests?

About 85% of chronic lower back pain has no identifiable structural cause. This is because most back pain is generated by the nervous system, not by damaged tissue. Your pain is real, but it is coming from learned brain pathways rather than a structural problem.

Can you have lower back pain with a normal MRI?

Yes. Research shows that 50% of pain-free 40-year-olds have disc bulges on MRI. These findings are normal age-related changes, not causes of pain. A normal MRI is actually a strong indicator that your back pain is neuroplastic.

What causes lower back pain when doctors find nothing wrong?

When structural causes are ruled out, the most likely cause is neuroplastic pain. Your brain has learned a pain pattern and continues generating pain signals even though your back is structurally sound. This type of pain responds well to brain-based treatment.

Is unexplained lower back pain in my head?

No. Neuroplastic back pain is generated by real neural pathways. The same brain regions that process a broken bone are producing your pain. It is not imaginary. But the source is your nervous system, not your spine. And that is actually good news because it means brain-based treatment can help.

References

1. Ashar YK, et al. Effect of Pain Reprocessing Therapy vs Placebo and Usual Care for Patients With Chronic Back Pain: A Randomized Clinical Trial.DOI: 10.1001/jamapsychiatry.2021.2669
2. Brinjikji W, et al. Systematic Literature Review of Imaging Features of Spinal Degeneration in Asymptomatic Populations.DOI: 10.3174/ajnr.A4173
3. Hashmi JA, et al. Shape shifting pain: chronification of back pain shifts brain representation from nociceptive to emotional circuits.DOI: 10.1093/brain/awt211