M89: Other disorders of bone

M89.0: Algoneurodystrophy

Algoneurodystrophy, also known as Reflex Sympathetic Dystrophy (RSD), is a condition that affects the nervous system. Your nerves send messages from your brain to other parts of your body. With this condition, these messages may become confused or excessive, leading to pain, swelling, and changes in your skin. Typically, it occurs after an injury or surgery, but it can sometimes happen without a known cause. Algoneurodystrophy typically impacts a single limb, like your arm, leg, hand, or foot, but can spread to other parts of your body. The pain is often described as a burning or throbbing sensation, and can be quite severe. As the condition progresses, the affected area may become sensitive to touch or cold, and the skin may change color, appearing red, blue, or even shiny. Without early treatment, the symptoms may worsen or become permanent.