Complex Regional Pain Syndrome (CRPS) was formerly known as Reflex Sympathetic Dystrophy (RSD). It is considered to be a multi-system syndrome or condition that is mainly characterised by pain that lasts for a long time after the normal length of time for healing.
CRPS will usually begin in one particular area of the body, but it can then spread away from the initially damaged area, even if it remains in one limb. CRPS can affect any part of the body.
In the United Kingdom, the main guidelines that are followed are the Royal College of Physicians (RCP) Guidelines for Complex Regional Pain Syndrome in adults. These RCP Guidelines for CRPS were updated in July 2018 (2nd Edition).