If the disc fragment does not interfere with the spinal nerves, the injury is usually not painful. If the disc fragment moves into the spinal canal and presses against one or more of the spinal nerves, it can cause nerve impingement and pain.
If the injured disc is in the low back, it may produce pain, numbness, or weakness in the lower back, leg, or foot. If the injured disc is in the neck, it may produce pain, numbness, or weakness in the shoulder, arm, or hand.