The operation worked. You are still in pain. Both of those are true.

AFTER SPINE SURGERY / FAILED BACK SURGERY SYNDROME

Failed back surgery syndrome is a terrible name for a real thing. It implies the surgeon failed, and usually nobody did. The decompression decompressed. The fusion fused. The imaging afterward looks like a technical success. And the pain is still there.

Why an anatomically successful operation leaves pain behind

Because the operation addressed a structure, and by the time you reached it the problem had stopped being only structural.

• Central sensitization. A nervous system that has processed nociceptive input for years changes how it processes it — the gain gets turned up, and it does not turn back down because a disc fragment was removed. This is the single largest reason for persistent pain after technically sound surgery.
• Epidural fibrosis. Scar forms where tissue was disturbed. A nerve root tethered in scar is a root that can no longer glide, and ordinary movement puts it under traction it was never built for.
• Adjacent segment load. Fuse two vertebrae and the levels above and below take more. That is mechanics, not a complication, and it declares itself years later.
• The wrong target. Sometimes the structure that was operated on was not the structure generating the pain. Given how common degenerative findings are in pain-free spines, this happens more than anyone would like.

The part that gets left out of the consent conversation

Two of those four are foreseeable before the knife. Central sensitization is measurable preoperatively. Adjacent segment loading is a known consequence of fusion, not a surprise.

They get left out because the system funds the operation and does not fund the hour of assessment that would have found them. That is medicalization doing what its incentives reward — the repeatable procedure is reimbursed, the upstream work is not — and the person who pays for the gap is the patient sitting in a chair two years later being told their scan looks fine.

What we actually look for

The first job is to stop treating “failed back surgery” as a diagnosis. It is a description of a situation, and situations have components that can be taken apart.

• Is there a residual structural target? A recurrent disc, a foraminal stenosis, an adjacent level. Established with a diagnostic block, not inferred from a report.
• Is the sacroiliac joint involved? After lumbar fusion it very often is, and it is routinely missed because everyone is still looking at the fused segment.
• Is a nerve tethered rather than compressed? A different problem with a different answer.
• How much of this is central? If the answer is most of it, more procedures will disappoint and the honest plan looks different.
• What is the metabolic terrain? Insulin resistance and metainflammation impair every repair process this body is being asked to run, including healing around a surgical site.

The segments either side are in the same body

An operation changes the mechanics at one level. It does not change the biology of the person the spine belongs to, and the discs above and below the fusion are being asked to absorb more load in exactly the conditions that degraded the first one.

Those conditions have been quantified. Pooling 20 Mendelian randomization studies of intervertebral disc degeneration, the largest modifiable lifestyle effect was sedentary time, at an odds ratio of 1.78 (95% CI 1.52 to 2.08) — ahead of body mass index (1.26), smoking initiation (1.22) and type 2 diabetes (1.05). This is the cruelty of the post-operative situation: pain reduces movement, reduced movement is itself a driver of further degeneration, and the next level fails faster than it otherwise would. A separate systematic review of 27 studies points the same way from the vascular side, finding support for inadequate blood supply as a contributor to disc degeneration, though with mixed results across its included studies.

None of that is offered as a reason the operation was wrong. It is the reason a second procedure aimed only at the next level, in an unchanged body, tends to buy less time than the first one did — and the reason the plan we propose after a failed back operation always has a metabolic and a loading component alongside whatever is done to the spine. What we measure is on the metabolic health page.

Where a biological treatment fits, and where it does not

It fits where a specific structure has been identified and that structure is amenable: a facet joint carrying load after a fusion, a sacroiliac joint that has taken over, a nerve tethered in scar where hydrodissection with platelet lysate can free it without adding inflammatory particulate to an already irritable root.

It does not fit where the dominant mechanism is central, where there is progressive neurological deficit, or where hardware has failed. Those are, respectively, a different treatment, a surgical opinion and a surgical opinion.

Why lysate rather than PRP around a nerve · Facet joints · The sacroiliac joint.

What we will not do

• Tell you the last surgeon was wrong. We were not there and it is usually not true.
• Offer a series of injections into a target nobody has confirmed.
• Treat a scan that shows post-surgical change, which every post-surgical spine does.
• Imply that a biological treatment reverses a fusion or regrows a disc.

The waiting, and what it costs

A large share of the people in that waiting period are inside a workers’ compensation or liability claim, where the delay is not a personal choice but a scheduling decision made by somebody else — which is its own problem, set out on injury and work comp.

Most people arrive here years after the operation, not months. That interval is not neutral and it is worth naming what happens inside it.

Reduced movement produces sarcopenic wasting — muscle lost from the trunk and legs that were already deconditioned before surgery. Lost muscle worsens glucose disposal, which raises the inflammatory tone the nervous system is already amplifying. Sleep fragments, and fragmented sleep lowers pain thresholds measurably while removing the overnight window in which most tissue repair signaling happens. Social range contracts, and isolation is not a soft outcome — it independently raises inflammatory markers.

So the person who arrives at year four is not simply four years older with the same problem. The problem has recruited a metabolic and behavioral component that was not there at the start, and treating the spine alone now addresses a shrinking fraction of it.

What a realistic plan looks like

• Take the problem apart first. Structural, neural, central — in what proportion. This is the step that is nearly always skipped.
• Treat what is confirmed, and only that. A block before a level.
• Free what is tethered rather than injecting around it blindly.
• Rebuild capacity deliberately. Graded loading, not rest, and supervised rather than handed over on paper.
• Address the terrain. Glycaemic control, sleep, and the behavioral work that a sensitized nervous system actually responds to — delivered here rather than referred out to happen somewhere else in six months.
• Agree in advance what failure looks like, so there is a point at which we stop rather than escalate.

That last item is the one most missing from this population’s history. A great many people with persistent post-surgical pain have had a decade of interventions with no stated endpoint, which is how a treatment plan becomes a subscription.

Where this sits against pain medication

This is the population most likely to arrive on an escalating opioid dose that nobody has revisited, and most likely to have been made to feel that the persistence of their pain reflects something about them. Nobody here will require a taper as a condition of being assessed, and the dose will not be read as a character question. What we can offer is the thing that is usually missing: an actual attempt to work out which component of this is structural, which is neural and which is central — because those have different answers and lumping them together is why nothing has worked.

What people ask years after the operation

Does this mean my surgery was a mistake?

Usually not. An anatomically successful operation can still leave pain, for reasons that are mostly foreseeable. How we think about surgery.

My scan looks fine. Why do I still hurt?

Because scans show structure, and by this point the problem is often neural or central. Structure is not the same as pain.

Can PRP fix a failed fusion?

No. Hardware failure and pseudarthrosis are surgical problems. How we assess.

Is my SI joint the problem now?

After a lumbar fusion it frequently is, and it is commonly missed. Hip, SI joint or lumbar spine?

Related reading

• Failed neck surgery
• Spine and sacroiliac joint
• Platelet lysate
• Hip, SI joint or lumbar spine?