Depends on cause: Sciatica is an irritation of the sciatic nerve, formed from the outflow of low lumbar and sacral nerves that join in the middle buttocks to form the sciatic N. Therefore causes can involve pressure Over the N itself or irritation of any of its contributing Ns. Most often this is from L4 or L5 outflow. The piriformis muscle overlies the sciatic and can also spasm, causing symptoms. Treat the cause.
Answered 11/28/2017
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