Posted in Web What Is Reflex Sympathetic Dystrophy Syndrome? – WebMD July 9, 2024 Reflex sympathetic dystrophy syndrome (RSD) is a disorder that causes lasting pain, usually in an arm or leg, and it shows up after an injury, stroke, or even heart attack. https://www.webmd.com/brain/what-is-reflex-sympathetic-dystrophy-syndrome