Complex Regional Pain Syndrome (CRPS) is a painful condition that causes severe swelling in the arms, hands, legs, and feet and changes in skin color, temperature, and texture that varies in severity. This condition may be caused by damage in the peripheral and central nervous system. The pain caused by CRPS can become chronic and may be a prolonged feeling that is very uncomfortable depending on the severity of nerve damage caused from the injury. The pain from CRPS has been described as a burning or stabbing pain in the affected limbs that may spread the entire leg or arm. Other symptoms of Complex Regional Pain Syndrome include shiny or thin-looking skin with increased sensitivity to the area, abnormal sweating patterns, increased nail and hair growth patterns, stiff joints, and coordination issues.