What is Complex regional pain syndrome?

Complex regional pain syndrome , also known as reflex sympathetic dystrophy or Causalgia, describes an array of painful conditions that are characterized by a continuing regional pain that is seemingly disproportionate in time or degree to the usual course of any known trauma or other lesion. Usually starting in a limb, it manifests as extreme pain, swelling, limited range of motion, and changes to the skin and bones. It may initially affect one limb and then spread throughout the body; 35% of affected people report symptoms throughout their whole bodies. Two subtypes exist. Having both types is possible.