"I have sciatica." It's one of the most common self-diagnoses we hear — and often it's right. But a sizable minority of the burning, radiating leg pain that gets called sciatica isn't coming from the spine at all. It's coming from a muscle in the buttock, and the distinction isn't academic: the treatments point in different directions.
Two roads to the same leg pain
True sciatica is irritation of a nerve root where it exits the lumbar spine — usually from a herniated disc or stenosis. The sciatic nerve then carries that irritation down the leg.
Piriformis syndrome irritates the same nerve further downstream. The piriformis is a small, deep muscle running across the buttock, and the sciatic nerve passes directly beneath it (in some people, straight through it). When the piriformis is tight, inflamed, or in spasm, it compresses the nerve — producing buttock pain and radiating leg symptoms that mimic a disc problem convincingly.
The clues that separate them
Where it starts: disc-driven sciatica usually involves low back pain; piriformis syndrome is centered in the buttock, often with a specific deep tender spot, while the lower back itself feels fine.
What provokes it: disc pain typically flares with sitting, bending forward, coughing, and sneezing. Piriformis pain flares with prolonged sitting too — especially on hard surfaces or a wallet — but also with hip movements: climbing stairs, running, rising from low chairs.
The wallet detail: piriformis syndrome loves people who sit on a wallet, drive long hours, or run with weak glutes. We see it constantly in Houston commuters.
Exam findings: nerve-root tension tests and neurological screening point spinal; hip-position tests that stretch or contract the piriformis and reproduce the pain point muscular. A careful exam — sometimes with imaging to rule the disc in or out — sorts it.
Why the wrong label ruins the treatment
Disc-driven sciatica responds to directional exercise, spinal adjustments or flexion-distraction, decompression in appropriate cases, and time. Piriformis syndrome responds to almost the opposite emphasis: deep soft-tissue release of the muscle, targeted stretching, correcting the hip mechanics that overloaded it — usually weak gluteus medius forcing the piriformis to moonlight as a stabilizer — and adjusting the pelvis and SI joint when restriction is feeding the pattern. Stretch a piriformis when the problem is a disc and you get nowhere; decompress a spine when the problem is a muscle and you get nowhere slower.
The common thread
Both conditions respond well to conservative care once correctly identified, and both can coexist — an irritated nerve root makes the piriformis guard, which compresses the nerve further. That's why our exam at Blue Zone in The Woodlands tests the whole chain rather than stopping at the first positive finding.
If your "sciatica" hasn't improved with treatment, the diagnosis — not just the treatment — deserves a second look. The nerve is the messenger. The question is who's squeezing it.
