Sciaticasciatic neuritissciatic neuralgia, or lumbar radiculopathy is a set of symptoms including pain that may be caused by general compression or irritation of one of five lumbar nerve roots that give rise to each sciatic nerve, or by compression or irritation of the left or right or both sciatic nerves. The sciatic nerve (about the diameter of your thumb) is the largest nerve in the human body.  Symptoms include lower back pain, buttock pain, and pain, numbness or weakness in various parts of the leg and foot. Other symptoms include pins and needles or tingling and difficulty in moving or controlling the leg. Typically, the symptoms are only felt on one side of the body. The pain may radiate below the knee, but does not always.  A common cause of sciatica is a herniated lumbar disc.

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