The words on the report, translated

• Desiccation — the disc holds less water than it used to. Essentially universal past the thirties and by itself not a finding of any clinical weight.
• Bulge — the disc extends beyond the vertebral margin all the way around. A shape, not an event, and usually age-related.
• Protrusion — a focal extension where the base is wider than the part that sticks out.
• Extrusion — material has pushed through the outer annulus and the part outside is wider than the neck. More likely to be symptomatic, and also more likely to resorb on its own.
• Sequestration — a free fragment. Sounds the worst and often has the best resorption behavior of all.
• Annular fissure — a tear in the outer ring. Sometimes a genuine pain source, frequently incidental, and its old name of “high intensity zone” produced years of over-interpretation.

None of those terms carries a treatment recommendation. They describe morphology. What determines whether a disc is your pain generator is whether it correlates with your symptoms and your examination — and, when it matters, whether a targeted test confirms it.

When the disc probably is the problem

• Pain that is worse sitting and with sustained forward bending, and better standing or walking — seated flexion raises pressure inside the disc.
• Worse first thing in the morning, when the disc is maximally hydrated.
• Worse with coughing, sneezing or straining.
• Leg pain in a defined line below the knee, with matching numbness or weakness, which points to root involvement rather than to the disc as an axial pain source. Radiculopathy.
• A clear mechanical onset you can date, particularly lifting in flexion with rotation.

When it is almost certainly not

• Pain worse in extension — standing, walking downhill, reaching up — and eased by sitting. That is a facet pattern.
• Pain centered below the belt line, worst rolling over in bed. That is the sacroiliac joint.
• Symptoms limited by walking distance and relieved by leaning on a cart. That is stenosis.
• An imaging finding at a level that does not match the symptom distribution at all.
• Groin pain with restricted internal rotation of the hip — that is a hip, and it is misdiagnosed as a disc more often than anyone admits.

What happens to a herniated disc if nobody operates

A substantial proportion resorb. The immune system recognizes extruded nucleus material as foreign, mounts an inflammatory response and clears it — which is also part of why it hurt in the first place. Larger extrusions and sequestrations tend to resorb more completely than small contained protrusions, which is counterintuitive and clinically important.

The practical consequence is that time is a treatment for most disc herniations, and the job in the first weeks is to control pain well enough to keep moving and to avoid making an irreversible decision inside the window where the problem is resolving on its own. The exception, as always, is a progressive deficit or a red flag.

Why your disc failed and your neighbor’s did not

The disc has essentially no blood supply past childhood. It is fed by diffusion across the vertebral endplates, which means its entire nutritional supply depends on the health of the endplate microcirculation and on the pressure cycling that drives diffusion — load in the day, unload at night.

Both of those are metabolically vulnerable. Endplate microvasculature is damaged by the same processes that damage small vessels elsewhere in hyperinsulinemia and dyslipidemia, and calcification of the endplate blocks the diffusion route directly. Meanwhile glycation cross-links the collagen of the annulus, making it stiffer and more prone to fissuring under the same load. So the disc of a metabolically inflamed person is less well fed and more brittle before anything is lifted.

The third factor is the night. Disc rehydration happens during recumbent unloading, and short or fragmented sleep truncates it, so a person on a rotating schedule starts each day with a disc that has not fully recovered from the last one. Two workers, same pallet, same twenty years: the one sleeping six broken hours is running a repair deficit the other is not. That is the answer to why it was you.

Common questions

How to tell if low back pain is muscle or disc?

Muscular pain is typically worse on the first movements after rest and warms up; discogenic pain is worse with sustained sitting and flexion and does not warm up. Muscular pain is diffuse and moves; discogenic pain is more consistent in location. The overlap is genuine, and where the answer changes what we would do, it is worth testing rather than guessing.

The detail is in The drive is worse than the walk. That is the reverse of what most people expect..

What does a herniated disc feel like?

Most characteristically a deep central or one-sided low back pain that worsens with sitting, plus leg pain in a defined line if a root is involved. But herniations are also completely silent in many people, which is the whole point of this page.

The detail is in You can draw the line where it goes. That line is most of the diagnosis..

Should I get an MRI?

Only if the result would change what we do. Without a deficit or a red flag, early imaging tends to find incidental abnormalities that then get treated. If you already have a scan, bring it — the useful step is reading it against an examination rather than instead of one. What your MRI actually showed.

Can a herniated disc heal completely?

Frequently, yes, in the sense that the extruded material resorbs and symptoms resolve. The disc does not return to a young disc, and the more useful goal is a spine that tolerates load rather than a scan that looks normal.

The mechanism is covered in It is not a disease and it is not progressive in the way the name implies..

Related reading

• What your MRI actually showed
• Lumbar radiculopathy
• Lumbar facet syndrome
• Before you agree to the operation
• Epidural steroid injection