Condition Guide
Piriformis Syndrome
Deep buttock pain that mimics sciatica — but the cause is different.
What is Piriformis Syndrome?
Piriformis syndrome is a condition in which the piriformis muscle, a small external hip rotator located deep in the gluteal region, becomes hypertonic (excessively tight) and compresses or irritates the sciatic nerve as it passes beneath or, in roughly 15% of people, directly through the muscle. The result is deep buttock pain that often radiates down the back of the leg, closely mimicking lumbar disc herniation sciatica. It is frequently misdiagnosed because imaging (MRI) of the lumbar spine often looks normal, leading clinicians to miss the piriformis as the source. Understanding the distinction is critical because the treatment approach differs significantly from disc-origin sciatica.
Common Symptoms
- Deep aching or burning pain in the middle of the buttock
- Pain that radiates from the buttock down the back of the thigh
- Pain that is specifically worse when sitting on hard surfaces
- Pain triggered by climbing stairs or performing hip external rotation
- Tenderness to deep palpation in the centre of the buttock
- Pain that is relieved by walking but worsened by prolonged sitting or standing
The Real Root Cause
The piriformis becomes hypertonic as a compensatory stabiliser when the primary hip stabilisers, the gluteus maximus and medius, are inhibited. This inhibition almost always originates from anterior pelvic tilt: when the pelvis tilts forward, the glutes are placed in a mechanically disadvantaged position and their neural drive is reduced. The piriformis then compensates by becoming the primary external rotator and stabiliser of the hip, a role it can perform but not sustain without becoming overloaded and tight. The tight piriformis then compresses the sciatic nerve that runs adjacent to it. Addressing only the piriformis with stretching provides temporary relief because the glute inhibition that caused the piriformis to overwork is still present.
How We Fix It
The Piriformis Syndrome program addresses the structural chain: correcting anterior pelvic tilt to restore glute activation, activating the inhibited glutes to reduce the compensation demand on the piriformis, releasing the hypertonic piriformis once the underlying driver is being addressed, and restoring normal hip rotation mechanics so the piriformis returns to its appropriate workload.
Correct anterior pelvic tilt
Pelvic correction is the most important step. When the pelvis is neutral, glute activation becomes mechanically possible and the compensation demand on the piriformis begins to reduce.
Activate inhibited glutes
Glute bridge and hip extension work reactivates the glute max and medius, directly reducing the overcompensation load on the piriformis. This is the step most approaches skip, and why piriformis stretching alone fails.
Release the piriformis
Once the structural driver is being addressed, piriformis release, through targeted stretching (pigeon pose, hip crossover stretch) and soft tissue work, is effective and lasting because the muscle is no longer being driven back into hypertonicity by glute inhibition.
Restore full hip rotation range
Restoring both internal and external hip rotation range reduces the mechanical demand on the piriformis during movement and sitting, preventing the cycle of tightening from recurring.
The Fix It Program
Piriformis Syndrome Program
Everything you need to correct piriformis syndrome, step-by-step video exercises, structured progressions, and the exact sequence Mike uses with clients.
Frequently Asked Questions
How do I know if I have piriformis syndrome or disc herniation sciatica?
Disc herniation sciatica typically produces pain that follows a specific dermatomal pattern along the leg, worsens with coughing, sneezing, or spinal flexion, and may include neurological deficits (weakness or reflex changes). Piriformis syndrome produces more localised deep buttock pain that is specifically triggered by sitting on hard surfaces and external hip rotation (crossing the legs), with leg pain that is more diffuse. A normal lumbar MRI in the presence of sciatica-like symptoms strongly suggests piriformis syndrome. Both conditions can be present simultaneously.
Will stretching the piriformis fix it?
Piriformis stretching provides temporary relief but does not fix the root cause. The piriformis is tight because the glutes are inhibited and the pelvis is tilted, so the muscle is being driven into hypertonicity by a structural problem. Without correcting pelvic tilt and activating the glutes, the piriformis will return to its tight state shortly after every stretch session.
How long does piriformis syndrome take to resolve?
With the correct structural approach, most people experience significant reduction in deep buttock pain within 3–4 weeks. Complete resolution, where the piriformis no longer compensates and the glutes are fully reactivated, typically takes 8–12 weeks of consistent work. People who have had the condition for months to years may have some additional piriformis fibrosis that requires more time.
Written by Mike Boshnack
Certified Egoscue Therapist · Posture Guy Mike
Mike Boshnack grew up skateboarding and surfing, trained MMA, and rode road bikes competitively, before a shoulder injury put him on a path to discover the Egoscue Method. He's since helped thousands of people fix the structural root causes of chronic pain, without surgery or passive treatments.