Reflex Sympathetic Dystrophy (RSD), also called complex regional pain syndrome (CRPS), is a chronic, painful, and progressive neurological condition that affects the skin, muscles, joints, and bones. The syndrome usually develops in an injured limb, such as a broken leg, or following surgery. However, many cases of RSD involve only a minor injury, such as a sprain. And in some cases, no precipitating event can be identified.
The most common symptoms overall are burning and electrical sensations, described to be like “shooting pain.” The patient may also experience muscle spasms, local swelling, abnormally increased sweating, changes in skin temperature and color, softening and thinning of bones, joint tenderness or stiffness, restricted or painful movement.