Sciatica vs. Piriformis Syndrome: How to Tell the Difference

Shooting pain from the low back or buttock down the leg gets called sciatica almost universally. But sciatica is a description of symptoms, not a diagnosis. It says the sciatic nerve is irritated, not why.

The two most common causes need genuinely different treatment, and this is one of the more consequential distinctions in musculoskeletal care.

Disc-driven sciatica (lumbar radiculopathy)

Here the nerve is compressed at its root, where it exits the spine, usually by a disc herniation or by narrowing from degenerative change. The irritation happens in the low back even though you feel it in the leg.

Typical features:

• Pain often begins in the low back and travels down
• Sitting makes it distinctly worse, sitting raises intradiscal pressure
• Coughing, sneezing, or straining sharply increases leg pain
• Symptoms follow a specific dermatome, often into particular toes
• May include measurable weakness, altered reflexes, or numbness in a defined pattern
• Bending forward often aggravates it

Piriformis syndrome

Here the nerve is compressed further downstream, in the buttock, where it passes beneath (or in some people through) the piriformis muscle. The spine may be entirely fine.

Typical features:

• Pain centers in the buttock rather than the low back
• Deep, aching, hard-to-localize quality
• Prolonged sitting hurts, especially on a hard surface or a wallet
• Direct pressure on the buttock reproduces it
• Often worse with activities involving hip rotation, driving, cycling, climbing
• Neurological testing is usually normal; no dermatomal pattern, no reflex change

Why getting it right changes everything

For disc-driven sciatica, the priority is decompressing the nerve root. Non-surgical spinal decompression, laser to reduce inflammation around the root, and specific adjustments to restore motion at the involved level. Critically, aggressive piriformis stretching can make disc-driven sciatica worse. You are pulling on an already inflamed, tethered nerve.

For piriformis syndrome, the priority is releasing the muscle and fixing why it is overworking. Soft tissue work, targeted stretching, and hip strengthening, because a piriformis that is chronically overworked is usually compensating for a weak gluteus medius. Spinal decompression does very little here.

Same symptom, opposite emphasis. This is why an accurate exam at the outset is the difference between resolving in six weeks and spending six months on the wrong protocol.

What a proper exam includes

Neurological testing, sensation, reflexes, and strength in the patterns each nerve root controls, identifies whether a specific root is involved and which one. Orthopedic testing such as straight leg raise and slump testing points toward disc involvement, while tests that load the piriformis specifically point the other way. Palpation, movement assessment, and imaging when warranted fill in the rest.

It is also entirely possible to have both, and a fair number of patients do. That does not make the exam pointless. It makes it more important, because it tells us which one is driving the current symptoms and therefore where to start.

Get evaluated promptly if you have these

• Loss of bladder or bowel control. This is an emergency
• Numbness in the groin or saddle region, also an emergency
• Progressive weakness or a foot that drags
• Symptoms in both legs at once

For everything short of that, conservative care resolves the large majority of cases. If you have leg pain that is not improving, call (972) 433-7557 and we will figure out which one you actually have.