Complex Regional Pain Syndrome complex regional pain syndrome Complex Regional Pain Syndrome complex regional pain syndrome Complex Regional Pain Syndrome WebMD WebMD individuals between the ages of 20 and 35 Reflex Sympathetic Dystrophy/Complex Regional Pain Syndrome CRPS/RSD Complex Regional Pain Syndrome Complex Regional Pain Syndrome individuals between the ages of 20 and 35 causes of CRPS RSD/ Complex Regional Pain Syndrome Complex Regional Pain Syndrome Reflex Sympathetic Dystrophy/Complex Regional Pain Syndrome