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What are causes of sciatica?
While sciatica is most commonly a result of a lumbar disc herniation directly pressing on the
nerve, any cause of irritation or inflammation of the sciatic
nerve can reproduce the symptoms of sciatica. This irritation of nerves as a result of an abnormal intervertebral disc is referred to as radiculopathy. Aside from a pinched nerve from a disc, other causes of sciatica include irritation of the nerve from adjacent bone, tumors, muscle, internal bleeding, infections, injury, and other causes. Sometimes sciatica can occur because of irritation of the sciatic nerve during pregnancy.
Picture of a herniated disc, a common cause of sciatica