Piriformis is a muscle in your buttocks with an unusual shape like a pear. It extends from the bottom of your spine to the top of your thigh. The sciatic nerve is the biggest single nerve in the human body. It serves a vital role in connecting the spinal cord with the leg and foot muscles. A spasm is an involuntary muscle contraction. A spasm of the piriformis can cause some buttock pain. When this muscle tightens, it can compress against the sciatic nerve. The sciatic nerve passes on the piriformis muscle. A tightening of this muscle compresses against the sciatic nerve. This will cause shooting pain, tingling or numbness anywhere from the hip to the lower leg or foot. Tense and tightness of this muscle can induce the muscle to involuntary spasm. This is especially for people who lead a sedentary lifestyle.
The initial symptoms are pain, tingling or numbness in the buttock area. Pain can be mild to severe, and this pain extends from the buttock down to the length of the sciatic nerve. This pain is a result of the piriformis muscle compressing against the sciatic nerve. Many activities will involve pressure contact between the nerve and the muscle. Simple movements like driving, climbing or even sitting for hours are culprits. They can cause some muscle pressure on your sciatic nerve.
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