Sciatic is common type of pain affecting the sciatic nerve. Sciatica can occur suddenly it can be develop gradually. This might feel like bad leg cramp, shooting pain that makes standing or sitting nearly impossible. Sciatica is a Pulsating pain that starts in the lower back or buttocks region and travels to either one or both legs. Typically, symptoms only manifest on one side of the body. The pain may radiate above the knee, but does not always.