Sciatica pain can be almost anywhere along the nerve pathway. It's especially likely to follow a path from the low back to the buttock and the back of a thigh and calf. The pain can vary from a mild ache to a sharp, burning pain. Sometimes it can feel like a jolt or electric shock. It can be worse when coughing or sneezing or sitting a long time. Usually, sciatica affects only one side of the body. Some people also have numbness, tingling or muscle weakness in the leg or foot. One part of the leg can be in pain, while another part can feel numb.