Sciatica (or sciatic neuritis)'s a set of symptoms including pain that may be caused by general compression and/or irritation of one of five nerve roots that give rise to the sciatic nerve, or by compression or irritation of the sciatic nerve itself. The pain's felt in the lower back, buttock, and/or various parts of the leg and foot. In addition to pain, which's sometimes severe, there may be numbness, muscular weakness, pins and needles or tingling and difficulty in moving or controlling the… (More on Sciatica)