Slipped Disk: An abnormal, injured, or degenerated vertebral disk that has protruded against nerve fibers is called a slipped, prolapsed, ruptured, or herniated disk. A slipped disk may cause symptoms such as pain down the back of the leg (sciatica), numbness or weakness. Treatment may include applying hot or cold packs, limiting activity, taking pain relievers, stretching, performing strengthening exercises, physical therapy, massage, or surgery.