April 23, 2026

Experiencing discomfort from prolonged sitting, inactive glutes, or pain in the buttock that radiates down the back of the leg? Although small, the piriformis muscle plays an important role in body movement. When this muscle becomes tight or irritated, it can lead to a condition known as piriformis syndrome.

In this guide, you’ll learn what the piriformis muscle does, what piriformis syndrome is, and which stretches and exercises may help relieve discomfort.

What Is the Piriformis Muscle?

The piriformis is a small muscle located deep in the buttock. It:

• Originates from the front surface of the sacrum (the base of the spine)
• Passes through the greater sciatic foramen
• Attaches to the greater trochanter of the femur (upper thigh bone)

Its primary functions include:

• External rotation of the hip
• Hip abduction
• Hip extension

Although small, the piriformis helps stabilize the hip during movement.

What Is Piriformis Syndrome?

Piriformis syndrome occurs when the piriformis muscle becomes tight, inflamed, or goes into spasm, placing pressure on the sciatic nerve.

Because the sciatic nerve runs underneath—or sometimes through—the piriformis muscle, irritation of this muscle can compress the nerve.

This compression may cause symptoms similar to sciatica, including pain that radiates from the buttock down the back of the leg.

Signs and Symptoms of Piriformis Syndrome

Common symptoms include:

• Pain in the buttock
• Pain down the back of the thigh
• Pain while sitting
• Pain when climbing stairs or walking uphill
• Reduced range of motion in the hip
• Tenderness in the piriformis area

Because these symptoms resemble other spinal or nerve conditions, diagnosis can sometimes be challenging.

Why Piriformis Problems Develop

The exact cause of piriformis syndrome is not always clear. However, several factors may contribute:

• Tight hip flexors
• Weak or inactive glute muscles
• Overuse of the hip rotator muscles
• Prolonged sitting
• Poor movement patterns

When the glute muscles become weak or inactive, the piriformis may become overworked, leading to tightness or muscle spasms.

Piriformis Syndrome Treatment Approach

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