Complex regional pain syndrome, CRPS, is an uncommon but often very handicapping chronic pain syndrome. Most often, a single extremity is affected. The diagnosis is subdivided in CRPS type I where no nerve injury has been identified, and CRPS type II when a major nerve injury has been verified. With the exception of spontaneous pain, several of the symptoms related to CRPS may be connected to the inactivity and immobilization often seen in the history of CRPS patients.