What the name actually means

“Failed back surgery syndrome” is a poor name for a real thing, because it implies the operation failed. Usually it did not. The fusion is solid, the decompression is adequate, the hardware is where it should be, and the post-operative film is exactly what the surgeon hoped for.

What that film cannot show is why you still hurt. There are five common reasons and they are separable, which is the entire point of this page — because “failed back surgery” treated as one diagnosis leads to one more operation, whereas treated as five possibilities it leads to a test.

The five reasons, and how each is identified

Why nobody is looking

There is a structural reason this group is under-served, and it is worth naming plainly because it is an incentive problem rather than a failure of individuals. The surgeon’s question is whether the operation achieved its technical goal, and it did. The referring physician sees a post-operative spine and a satisfactory film. Nobody’s role is to ask which structure is generating pain in a spine that has already been operated on, and so nobody asks it.

Meanwhile the patient has been through a major operation, a long recovery and an expectation of resolution, which makes reporting ongoing pain socially costly. People in this position minimize, and minimizing gets recorded as improvement.

Why sensitization is so often the missing piece

A spine that has hurt for two years before an operation has been sending nociceptive traffic into the dorsal horn for two years. That input produces real, measurable changes: lowered thresholds, expanded receptive fields, reduced descending inhibition. The nervous system has learned the pain, and no operation on bone addresses a learned signal.

Two things sustain that state after surgery. The first is sleep, which is almost universally wrecked in this group and which is when descending pain inhibition is restored — short sleep measurably lowers pain threshold the next day. The second is metabolic inflammation: elevated inflammatory tone maintains glial activation and keeps the system primed, and it also slows the healing of the surgical site itself and the fusion mass.

The third factor is the one nobody writes down. This group is disproportionately isolated — out of work, out of the activities that carried their social contact, and carrying the particular shame of an operation that did not deliver. Isolation is not a soft correlate of chronic pain; it is one of the better-established amplifiers of it, and a plan that treats only the spine leaves the amplifier running.

What we actually do

We start by discarding the label. “Failed back surgery” is not a diagnosis we can treat; a symptomatic facet joint at the level above a fusion is. So the workup is the same one that should have preceded the operation: examine, name a candidate structure, test it with a block, treat what was confirmed.

Where the answer is adjacent-level facet pain, radiofrequency neurotomy is often durable and does not touch the construct. Where it is the sacroiliac joint, that is a different and very treatable answer. Where the dominant finding is sensitization, more procedures will not help and we will say so — the work there is sleep, graded load, metabolic terrain and the in-house behavioral program, and it is slower and less satisfying to describe than an injection.

On medication, plainly: many people arrive here on long-term opioid therapy after a series of disappointing procedures. Nobody will make a taper the condition of being assessed and nobody will treat the dose as a character question. What interventional treatment can do is reduce the input the medication is covering, which is what makes reduction possible where it is wanted — and our own experience is that the reduction follows the relief rather than preceding it.

Common questions

Should I have revision surgery?

Sometimes, and specifically where there is a demonstrable mechanical problem — pseudarthrosis, hardware failure, a genuinely inadequate decompression, instability that can be shown. Where the problem is adjacent segment facet pain, sacroiliac pain or sensitization, revision has a poor record, and it is worth testing for those three before agreeing to it.

There is more on this in Someone has offered to fuse your spine..

Is the pain in my head?

No. Central sensitization is a physiological state of the nervous system with measurable features. It is not imagined, and it is not a psychiatric diagnosis. It does respond to a different kind of treatment than a joint does, which is why the distinction matters.

See Diminishing returns are information. Most people are offered another appointment instead..

How long after surgery should pain have settled?

Surgical site pain generally settles over weeks to a few months. Pain that is unchanged in character from before the operation, or that has a new pattern at three to six months, deserves investigation rather than more patience.

The mechanism is covered in Someone has offered to fuse your spine..

Do rods and screws break often?

They loosen and occasionally break at rates that are documented and not negligible, particularly where a fusion has not consolidated. If your pain changed character or a new mechanical pain appeared, that is worth imaging specifically for.

This is set out in Diminishing returns are information. Most people are offered another appointment instead..

Can anything be done this long after?

Yes. The duration changes what is likely to be driving it, not whether it is treatable. A facet joint above a ten-year-old fusion responds to a block the same way it would have at one year.

See Someone has offered to fuse your spine..

Related reading

• The diagnostic block, explained
• Sacroiliac joint pain
• Radiofrequency neurotomy
• Sleep and back pain
• Before you agree to the operation

Where a trial of stimulation fits after a failed operation.