Sciatica is nerve pain in the legs caused by a problem in the lumbar spine and is commonly felt from the buttock through the outside or back of the thigh into the calf and sole of the foot. It can also affect the front of the thigh or groin. It is often caused by a prolapsed lumbar disc pressing on nerve roots. The pain is typically shooting, burning or electric shock sensation and sometimes made worse by bending forwards. There may also be areas of numbness or pins and needles along the leg. Pain killers do not often help. Sciatica is best managed as early as possible and it can respond well to image guided spinal procedures as well as specific medication to dampen nerve signals. Surgery is only occasionally required when injections have failed.