After an injury such as a bruise, sprain or fracture of the arm or leg, complete healing and recovery occurs after a few weeks. In a small percentage of people, pain may persist at or around the injured site even though the skin or deeper tissues appear normal. This painful condition is called Complex Regional Pain Syndrome (CRPS). In some instances, the injury leading to CRPS may be so minor that patients sometimes cannot recall the injury or event that triggered CRPS.
