Complex Regional Pain Syndrome

Complex regional pain syndrome, sometimes referred to by the older names reflex sympathetic dystrophy or reflex neurovascular dystrophy, or as causalgia, is a rare and severe form of neuroinflammatory and dysautonomic disorder causing chronic pain along with neurovascular and neuropathic symptoms. The classic presentation occurs when severe pain from a physical trauma or a neurotropic viral infection outlasts the expected recovery time and may subsequently spread to uninjured areas. There are two types with the same symptoms, except that type two is associated with nerve injury.