Complex regional pain syndrome (CRPS) is a clinical syndrome of pain, autonomic dysfunction, trophic changes, and functional impairment. CRPS is common after hand trauma or surgery. Early diagnosis and intervention is critical for adequate recovery. The diagnosis of CRPS requires a careful history, physical examination, and supporting diagnostic testing. Optimal treatment requires a multidisciplinary approach. A large spectrum of pharmacologic interventions is efficacious in treating CRPS. Surgery may be used to relieve nociceptive foci. Patient-specific hand therapy is very important in reducing swelling, decreasing pain, and improving range of motion.