what is sympathetic dystrophy
Reflex sympathetic dystrophy (RSD) facts. 1  Reflex sympathetic dystrophy (RSD) is characterized by a group of symptoms including pain (often burning type), tenderness, and swelling of an extremity associated with varying degrees of sweating, warmth and/or coolness, flushing, discoloration, and shiny skin.eflex sympathetic dystrophy (RSD) facts. 1  Reflex sympathetic dystrophy (RSD) is characterized by a group of symptoms including pain (often burning type), tenderness, and swelling of an extremity associated with varying degrees of sweating, warmth and/or coolness, flushing, discoloration, and shiny skin.