Your Disc Bulge Might Not Be Causing Your Pain

Published March 4, 2026 · 7 min read

By Tauri Urbanik, Pain Science Researcher

Your doctor pointed to the MRI. "There's the problem."

You saw the image. A disc pressing against something it shouldn't. It looked bad. It sounded bad. Your doctor used words like "bulging," "herniation," "degeneration." And suddenly you had an explanation. The disc is the problem. Fix the disc, fix the pain.

But here's the part that changes everything. That disc bulge might not be causing your pain at all.

This isn't some fringe theory. It's one of the most replicated findings in spinal research. And it completely reframes what's actually going on in your back.

What researchers found when they scanned pain-free people

A massive review looked at MRI scans of over 3,000 people who had absolutely zero back pain (Brinjikji et al., AJNR, 2015↗). Not a twinge. Not a bad day. Nothing. Here's what showed up on their scans:

At age 30, 40% of pain-free people had disc degeneration. At 50, almost 60% had disc bulges. At 60, 68% had disc degeneration. At 80, 96% did. All completely pain-free.

Read that table again. These are people with NO pain. Half of all 40-year-olds walking around with disc bulges and feeling perfectly fine.

So why did your doctor blame the disc?

Because it was there. On the scan. Looking abnormal. And when a patient comes in hurting and an MRI shows a disc bulge, it's natural to connect the two.

But here's the problem. If half of all pain-free 40-year-olds have disc bulges too, the bulge can't be the explanation. It's like blaming gray hair for your headache. Yes, you have gray hair. Yes, you have a headache. But one didn't cause the other.

The nocebo effect of MRI language

This is where things get really interesting. Research shows that the words used to describe MRI findings actually make your pain worse. When a doctor says "herniation," "degeneration," or "severe disc disease," your brain interprets those words as evidence of danger. And a brain that perceives danger produces more pain.

It's called the nocebo effect. The opposite of placebo. Scary language literally increases your pain experience. Not because you're suggestible. Because that's how the brain works.

So the MRI didn't just fail to explain your pain. It may have made it worse.

If it's not the disc, what IS causing the pain?

Brain imaging research shows something remarkable. The biggest predictor of who develops chronic back pain isn't the condition of your spine. It's the connectivity patterns in your brain (Hashmi et al., Brain, 2013↗).

Your brain learned to produce pain. The original injury or irritation may have started things off. But over time, the pain signal became a learned pattern. Your nervous system got stuck. Researchers call this neuroplastic pain.

Could this apply to you?

This doesn't mean your disc doesn't matter

Let's be clear. We're not saying disc bulges are meaningless. In some cases, a large herniation pressing on a nerve root causes specific, testable symptoms. Radiating pain down a specific leg. Measurable weakness. Numbness in a predictable pattern. Those are structural signs that warrant structural treatment.

But most chronic back pain doesn't follow that pattern. It's vague. It moves. It fluctuates with stress. It doesn't match the location of the disc bulge. That's neuroplastic pain using a disc finding as a false explanation.

J

James, 52

back pain for 6 years

James was told his L4-L5 disc bulge was "significant" and started planning for surgery. Then his physical therapist showed him the Brinjikji research. Half of pain-free people his age had the same finding. His pain moved from left to right. It was worse during work stress and better on weekends. He realized the disc wasn't the driver. After brain retraining, his pain dropped from constant to occasional within eight weeks.

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

The research on what actually works

When researchers treated chronic back pain as a brain problem instead of a spine problem, the results were striking. A clinical trial published in JAMA Psychiatry found that 66% of patients became pain-free or nearly pain-free after just 4 weeks of Pain Reprocessing Therapy (Ashar et al., JAMA Psychiatry, 2022↗). Results held at one year. These were people who had been hurting for years.

No surgery. No injections. No targeting the disc. Just retraining the brain to stop sending false alarms.

Frequently asked questions

Can a disc bulge not cause pain?

Yes. Research scanning over 3,000 pain-free people found that disc bulges are extremely common and increase with age. At 40, half of people with zero pain have disc bulges. They're a normal part of aging, like gray hair.

How common are disc bulges in people without pain?

A major review of 33 studies found that 50% of 40-year-olds and 80% of 80-year-olds have disc bulges with no pain at all. At 80, 96% have disc degeneration. These findings are nearly universal and usually painless.

If my disc bulge isn't causing my pain, what is?

Research suggests most chronic back pain is neuroplastic, meaning your brain has learned to generate pain signals independently of structural damage. Brain connectivity, not injury severity, predicts who develops chronic pain.

Should I get surgery for a disc bulge?

A disc bulge alone isn't necessarily a reason for surgery. Since most disc bulges appear in pain-free people too, surgery may target something that isn't actually the cause. Consider a neuroplastic pain assessment first.

References

1. Brinjikji W, et al. Systematic Literature Review of Imaging Features of Spinal Degeneration in Asymptomatic Populations.DOI: 10.3174/ajnr.A4173
2. 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
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