Complex Regional Pain Syndrome (CRPS)
CRPS is estimated to afflict between 1.5 and 6 million people in the U.S.—that’s more than breast cancer, HIV/AIDS and multiple sclerosis combined. It is believed to be caused by an overactive nervous system. Also known as Reflex Sympathy Distrophy(RSD), the nature of the disease is not clearly understood. It is characterized by intense and continuous burning pain most often affecting the arms, legs hands, or feet.

There are three progressive stages of CRPS and the disorder can spread in some cases up the spine from a leg to an arm, and from an arm up into the head. Initially, symptoms may include swelling and sweating, along with temperature and color changes in the affected area. Severe atrophy, disfiguring muscle contractions and osteoporosis may follow.

CRPS is most common in people between the ages of 40 and 60, but it can occur at any age. Studies indicate that women are more likely to be affected by CRPS than men.