Complex regional pain syndrome, abbreviated as CRPS, is defined by the ]]>National Institute of Neurological Disorders and Stroke (NINDS)]]> as a chronic pain condition that stems from problems with the nervous system, either the central or peripheral nervous system. The ]]>National Institutes of Health (NIH)]]> states that one of two forms of CRPS can occur: type one is a chronic nerve disorder that affects the arms and legs after a minor injury, and type two is from nerve injury. Nerve conditions, like CRPS and ]]>neuropathy]]>, affect the body's ability to control movements, sensations and autonomic functions.
The NIH states that a patient with CRPS can go through three stages of the disorder. However, not all patients experience CRPS the same: some patients may stay in stage one, while other patients may have a faster progression.