Herniated or slipped disc (herniated nucleus pulposus).
February 22, 2005 (Press Release) --
What are the main causes of sciatica?
Herniated or slipped disc (herniated nucleus pulposus). This is by far the most common cause of sciatica
Pressure by the piriformis muscle in the buttock on the sciatic nerve. (Piriformis Syndrome)
Misalignment of the bones in the lower back and buttocks (Sacroiliac Joint Derangement)
Narrowing of the spinal canal that puts pressure on or pinches the fibers that make up the sciatic nerve
Slippage of one vertebra so that it is out of line with those above or beneath it (spondylolisthesis)
Abnormality of the nervous system itself, so that nerve fibers don't transmit signals properly, especially to feet and calves (neuropathy)
Tumor (this is rare)
http://www.sciatica.org/
Herniated or slipped disc (herniated nucleus pulposus). This is by far the most common cause of sciatica
Pressure by the piriformis muscle in the buttock on the sciatic nerve. (Piriformis Syndrome)
Misalignment of the bones in the lower back and buttocks (Sacroiliac Joint Derangement)
Narrowing of the spinal canal that puts pressure on or pinches the fibers that make up the sciatic nerve
Slippage of one vertebra so that it is out of line with those above or beneath it (spondylolisthesis)
Abnormality of the nervous system itself, so that nerve fibers don't transmit signals properly, especially to feet and calves (neuropathy)
Tumor (this is rare)
http://www.sciatica.org/
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