What is Sciatica? Sciatica is the name given to any sort of pain caused by irritation or compression of the sciatic nerve that travels from the lower spine, through the pelvis and down each leg. Typically the pain can range from mild to severe and sufferers often describe tingling, numbness, or weakness felt in the buttocks and leg, possibly including pain that radiates down the leg into the foot and toes. However the symptoms can vary based on the location of the pinched ner