Reflex Sympathetic Dystrophy (RSD) is a chronic pain condition typically affecting an arm or a leg. It often follows an injury or trauma and is characterized by severe pain, swelling, and changes in skin color and temperature in the affected area. The pain associated with CRPS is usually out of proportion to the initial injury and can be accompanied by other symptoms such as muscle atrophy, joint stiffness, and reduced range of motion.

CRPS is believed to involve dysfunction in the nervous system, where the body’s response to injury becomes exaggerated. The condition can significantly impact daily functioning and quality of life. Management often includes a combination of medications, physical therapy, and sometimes nerve blocks or other interventions. Early diagnosis and treatment are crucial in improving outcomes and potentially reversing some of the symptoms.