Failed Back Surgery Syndrome (FBSS) Explained

Published March 3, 2026 · 8 min read

By Tauri Urbanik, Pain Science Researcher

The diagnosis nobody prepares you for

You had back surgery. The surgeon said it went well. The MRI looks cleaner. By every structural measure, the operation was a success.

But you still hurt. Or you hurt differently. Or it got better for a while and came back. And somewhere along the way, someone used the term "failed back surgery syndrome."

It's a brutal name. It feels like a verdict. Like you failed at having surgery. You didn't. Let's look at what actually happened.

What FBSS actually means

Failed back surgery syndrome is a clinical term. It doesn't mean the surgery was botched. It means persistent or recurring pain after spinal surgery. And it's far more common than the pre-surgical conversation usually lets on.

That's not a fringe outcome. Depending on the type of procedure, up to 4 in 10 patients end up with ongoing pain. Spinal fusions carry higher rates than simple discectomies. And when those patients go back for revision surgery? The success rates drop even further, to 22-40%.

The medical system's response to failed surgery is often more surgery. With worse odds each time.

Why this happens: the structural assumption

Here's the core issue. Spinal surgery is based on a structural assumption: find the damaged thing, fix the damaged thing, pain goes away. It's logical. And for certain acute conditions (severe nerve compression, spinal instability, fractures), it works well.

But chronic back pain often doesn't follow this model. Research has shown that the structural findings used to justify surgery frequently appear in people with zero pain.

A systematic review of over 3,000 pain-free people found that by age 40, 50% had disc bulges. By age 60, 69% had disc degeneration. By age 80, 96% did (Brinjikji et al., AJNR, 2015↗). None of them had any pain.

So the disc bulge or degeneration your surgeon operated on? It may have been an incidental finding. Normal aging. Not the source of your pain.

Where the pain was actually coming from

Brain imaging research has transformed our understanding of chronic pain. Studies show that over time, chronic pain shifts from being tissue-driven to brain-driven (Hashmi et al., Brain, 2013↗). The brain learns a pain pattern and maintains it through neural pathways, independent of what's happening in the spine.

This explains why surgery can successfully remove a disc bulge and the pain stays. The bulge wasn't causing the pain. Learned brain pathways were.

It also explains why brain connectivity, not the severity of the structural finding, is the strongest predictor of who develops chronic pain (Baliki et al., Nature Neuroscience, 2012↗). The brain was the problem all along.

The evidence for a different approach

If FBSS involves neuroplastic pain, the treatment needs to target the brain, not the spine.

In a landmark clinical trial published in JAMA Psychiatry, Pain Reprocessing Therapy helped 66% of chronic back pain patients become pain-free or nearly pain-free in just 4 weeks (Ashar et al., JAMA Psychiatry, 2022↗). The treatment worked by retraining the brain's pain response. No additional surgery. No medication. And the results held at one year follow-up.

Compare that to revision surgery's 22-40% success rate, with all the associated risks and recovery time.

R

Robert, 58

back pain for 7 years

Robert had a laminectomy in 2017 and a spinal fusion in 2019. Neither helped. His surgeon suggested a third procedure. That's when Robert paused. Two surgeries, no improvement, a body full of hardware. When he investigated neuroplastic pain, the patterns were undeniable. His pain had started during his divorce. It was always worse during conflict. It had moved from his lower back to his mid-back after the fusion. None of this fit a structural model. He started brain retraining. Three months later, the pain he'd been surgically chasing for years was nearly gone.

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

Before you agree to another surgery

FBSS is not a life sentence. If you're being offered revision surgery, consider the evidence first. The structural finding that was operated on may never have been the problem. And revision surgery has significantly lower odds of helping.

Brain-based approaches offer a completely different pathway. One that targets where your pain is actually coming from.

Frequently asked questions

What is failed back surgery syndrome (FBSS)?

FBSS is a clinical term for persistent or recurring pain after spinal surgery. It affects 10-40% of patients who undergo back surgery. Despite the name, it doesn't always mean the surgery itself failed. It means the pain persisted or returned after the procedure.

Why does back surgery fail so often?

Surgery targets structural findings on imaging. But research shows these findings (disc bulges, degeneration) appear in most pain-free people too. In many FBSS cases, the pain was neuroplastic (brain-generated) rather than structural, so fixing the structure didn't address the actual source.

Should I get a second back surgery after the first one failed?

Revision surgery has significantly lower success rates, dropping to 22-40%. Before considering more surgery, explore whether your pain might be neuroplastic. If the first surgery didn't help, targeting brain pathways rather than spinal structures may be more effective.

Can FBSS be treated without more surgery?

Yes. If FBSS involves neuroplastic pain, brain-based approaches like Pain Reprocessing Therapy may help. In a clinical trial, 66% of chronic back pain patients became pain-free in 4 weeks using brain retraining. No surgery, no medication.

What percentage of back surgeries fail?

10-40% of back surgery patients develop persistent pain afterward, depending on the type of procedure. Spinal fusions have higher failure rates than discectomies. Revision surgeries have even lower success rates of 22-40%.

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
4. Baliki MN, et al. Corticostriatal functional connectivity predicts transition to chronic back pain.DOI: 10.1038/nn.3153