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Case home · Start at the beginning · The Reveal

Time To Read

4–6 minutes

Date Last Modified

August 30, 2026

The Spinal Cord module follows Stina’s disc herniation through surgery — and asks why the pain stayed after the disc was fixed and the root decompressed. Its answer: the pain had become its own disease, a cytokine-driven central sensitization the scalpel couldn’t reach. This page pairs that logic with the literature, as both a lived experience and a research-supported case.

ARRIVED HERE FROM A SEARCH?

If you were looking up one of these, you’re in the right place.

This page belongs to a teaching case built around familial Mediterranean fever (FMF), an IL-1β-driven autoinflammatory disease. If you found it while searching persistent pain or a spineProminent ridge on the posterior scapula dividing it into supraspinous and infraspinous fossae. finding — for a patient, or for yourself — it is a valid, evidence-anchored starting point.

Jump to it:

Central sensitization

Allodynia / hyperalgesia

FMF and sacroiliitis

Spinal Cord Stimulation

IL-1β / IL-6 & the dorsalRelating to the back side of the body. horn

What this case is

An MRI finally gave Stina’s leg pain a picture — an L4/L5 disc pressing a nerve root — and a discectomy took the pressureThe force exerted by gases in the respiratory system, affecting airflow and gas exchange. off. But the pain stayed. Light touch and clothing began to hurt (allodynia), ordinary pain felt magnified (hyperalgesia), and her IL-1β and IL-6 ran high. She was told, “the disc is fixed, your pain should be gone.” the Spinal Cord module reads that persistence not as a failed operation but as the nervous systemThe organ system that controls body functions using electrical and chemical signals. itself turning up the volume.

Why the logic holds

Central sensitization is not hand-waving: it is measurably elevated in FMF patients,³ and MEFV gene variants have been associated with fibromyalgia, the prototype central-sensitization syndrome.⁴ The mechanism is well mapped — IL-1β and IL-6 act on superficialNear the surface of the body. dorsal-horn neuronsThe functional cells of the nervous system that transmit signals. to lower firing thresholds and sustain pain hypersensitivity,^1,2 and cytokines released after nerve-root injury drive exactly this kind of persistent pain.^9,10 (These pain-mechanism sources are general neuroscience, flagged as such.) FMF also reaches the spine structurally: seronegative spondyloarthropathy and sacroiliitis are recognized associations.^5,6

Why it’s useful

If you reached this page searching central sensitization, persistent post-surgical pain, or FMF-related back pain, that is the page doing its job — a reminder that pain outlasting its fix is a diagnosis, not a character flaw. It also explains the treatment turn: neuromodulation. Spinal cord stimulation has a randomized-trial evidence baseA substance that accepts hydrogen ions (H⁺) or releases hydroxide ions (OH⁻). for neuropathic pain,^7,8 and suits a sensitized, inflammation-driven cord better than another operation on a disc that is already fixed.

Each step of the case, and the literature behind it

Pain after the disc was fixed

Parts 5, 7 · Chart Clue #9

Allodynia and hyperalgesia persisting after successful decompression are cytokine-driven central sensitization — pain that has become its own disease — not a failed surgery.

SUPPORTING EVIDENCE

Central sensitization in FMF patients, 2022 · MEFV variants & fibromyalgia, 2013

High IL-1β / IL-6 with the pain

Part 5

IL-1β and IL-6 lower the firing thresholdThe minimum voltage needed to trigger an action potential. of dorsal-horn neurons and keep the “pain gate” jammed open, especially after nerve-root injury.

SUPPORTING EVIDENCE

Cytokine mechanisms of central sensitization, J Neurosci 2008 · Cytokine antagonism after nerve-root compression, 2010 · IL-6 in pathological pain, 2016general pain neuroscience, not FMF-specific

A spine under inflammatory strain

Case context

FMF reaches the spine structurally too — sacroiliitis and seronegative spondyloarthropathy are recognized associations, a backdrop of inflammatory back pain.

SUPPORTING EVIDENCE

Seronegative spondyloarthropathy in FMF, 1997 · Sacroiliitis in FMF, 2021

Flaccid neurogenic bladder

Part 4

Loss of bladderA muscular organ that stores urine before excretion. sensation and emptying reflects sacral nerve-root injury requiring intermittent catheterization — established clinical neuroanatomy.

SUPPORTING EVIDENCE

Standard spinal-cord / cauda-equina neuroanatomyclinical anatomyThe study of the structure of the human body., not

The stimulator that helped

Part 6

Neuromodulation suits sensitized, inflammation-driven pain better than more surgery — and has a randomized-trial evidence base for neuropathic pain.

SUPPORTING EVIDENCE

Spinal cord stimulation RCT (PROCESS), Pain 2007 · SCS: efficacy & mechanisms review, 2014

A NOTE FROM THE AUTHOR

Stina is not a composite. Stina is me. The pain that outlived the surgery was mine, and so was the sentence that followed me for years — “the disc is fixed, your pain should be gone” — which quietly told me the problem must be in my headRounded proximal end that fits into the acetabulum of the hip bone.. It was not. It was in my cord, in neurons that inflammation had taught to shout.

This page holds both truths at once. The lived experience — being told your very real pain should have ended, and being left to doubt yourself when it didn’t — is the part a chart never records. The research support is what earns the case a place in a science course: the FMF-specific evidence (central sensitization, sacroiliitis) is cited directly, and the pain-mechanism sources are flagged as general neuroscience. If you are a clinician who arrived from a patient, treat this as a validated starting point that respects the patient’s experience and then hands you the literature.