Reflex sympathetic dystrophy and causalgia are now classified by the International Association for the study of Pain as Complex Regional Pain Syndrome "CRPS" type I and II. Pain is trhe cardinal feature of "CRPS", but the symptoms and signs may also include sensory changes, autonomic dysfunctions, trophic changes, motor impairment and psychological changes.Diagnosis is based on the clinical picture with some diagnostic tests. The treatment must be started early, it include: sympatholytic procedures "pharmacological or nerve block techniques".