CausesÄespite the name, sciatica is not typically caused by a problem with the sciatic nerve. These nerve roots combine to form this large nerve that branches from your lower back through your hips and buttocks and down each leg. ![]() It is about the diameter of your little finger and composed of five nerve roots that start in your lower spine. Sciatica is named after the sciatic nerve, which is the largest nerve in your body. Sciatica refers to a sharp, shooting pain that runs from your lower back down the side or the back of your leg. ![]() ![]() Most people have heard of sciatica and may have experienced it at some point.
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