Reaex sympathetic dystrophy (RSD) is often caused by trauma, otherwise known as posttraumatic pain syndrome or posttraumatic sympathetic dystrophy, which manifests severe burning pain (causalgia), hyperesthesia, excessive perspiration, as well as pathologic changes of the bone, skin, and muscles at the region of trauma or area innervated by the same newe. It is also called chronic regional pain syndrome. It occurs mostly on the limbs, and the trigger trauma may be external injuries, sprain, fracture, and surgical operation, injuries of blood vessels or nerves, as well as cerebral damage. Patients diagnosed with posthemiplegic omalgia, shoulder-hand syndrome or shoulder-arm syndromes are actually categorized under this disease. To date, there are five to six million people in the USA are suffering from this disease, but it is often poorly understood clinically, and not timely recognized at its early stage . If this disease carmot be treated at its early stage, it will rapidly spread to the entire affected limb and result in irreversible changes of regional bones and muscles. About 50% of patients had pain lasting from half a year to several years. Acupuncture generally has sadsfactory therapeudc effectiveness for disease, especially at its early stage.