It is brought on by the compression or irritation of the sciatic nerve. This is a nerve situated deep in the buttock that runs down the leg. The sciatic nerve is the longest nerve in body ranging from the rear of your pelvis, through your buttocks, back of legs and finishing at your feet. If you are experiencing tingling/pins & needles, tingling or muscle weak point in your leg due to sciatica it is essential that have a comprehensive analysis of your symptoms. Discovering Balance: Acupuncture ...