Piriformis syndrome is a result of impingement of the sciatic nerve by the piriformis muscle.
Incorrect form or improper gait often leads to tightness and inflexibility in piriformis.
The condition occurs more frequently in women than men (6:1). When piriformis becomes tight it puts pressure on the underlying nerve, causing pain similar to sciatica.
The pain usually starts in the mid-gluteal region and radiates down the back of the thigh.
Trigger Points
Trigger points are often associated with piriformis syndrome.
This may include cases where active trigger points in the piriformis cause the shortening and tightening of the muscle leading to impingement of the sciatic nerve.
In other cases trigger points in associated muscles may become active in response to the sensitivity of the sciatic nerve - i.e. part of a protective holding pattern.
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