CRPS is associated with imbalance and malfunction of the autonomic nervous system resulting in disability, impairment, chronic pain, and functional loss. The International Association for the Study of Pain has proposed dividing CRPS into two types. Type I , formerly known as Sudeck’s atrophy or reflex sympathetic dystrophy (RSD) does not exhibit demonstrable nerve lesions. The vast majority of people suffering from CRPS have this type. Type II , formerly known as causalgia, has obvious nerve damage present. As a rule, type II is considered the more painful of the two types with an unenviable 47/50 score on the McGill pain scale.