Complex Regional Pain Syndrome or CRPS, formerly known as RSD(Reflex Sympathetic Dystrophy), is a progressive incurable chronic severe pain disease of the Autonomic Nervous System, and more specifically, the Sympathetic Nervous System. The sympathetic nervous system is that part of the autonomic nervous system that regulates involuntary functions of the body such as increasing heart rate, constricting blood vessels, and increasing blood pressure. Excessive or abnormal responses of portions of the sympathetic nervous system are thought to be responsible for the pain associated with complex regional pain syndrome. The pain from CRPS is usually out of proportion from the original injury and is characterized by constant and extremely intense burning pain. This disease most often affects one l

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