Classification
Type I, formerly known as reflex sympathetic dystrophy (RSD), Sudecks atrophy, or algoneurodystrophy, does not exhibit demonstrable nerve lesions. As the vast majority of patients diagnosed with CRPS have this type, it is most commonly referred to in medical literature as type I. Type II, formerly known as causalgia, has evidence of obvious nerve damage. Despite evidence of nerve injury, the cause or the mechanisms of CRPS type II are as unknown, as the mechanisms of type I.Patients are frequently classified into two groups based upon temperature: "warm" or "hot" CRPS in one group and "cold" CRPS in the other group. The majority of patients (about 70%) have the "hot" type, which is said to be an acute form of CRPS. Cold CRPS is said to be indicative of a more chronic CRPS and is associated with poorer McGill Pain Questionnaire scores, increased central nervous system involvement, and a higher prevalence of dystonia. Prognosis is not favourable for cold CRPS patients; longitudinal studies suggest these patients have "poorer clinical pain outcomes and show persistent signs of central sensitisation correlating with disease progression". Prevention
Vitamin C may be useful in prevention of the syndrome following fracture of the forearm or foot and ankle. Treatment
Treatment of CRPS often involves a number of modalities. Therapy
Physical and occupational therapy have low-quality evidence to support their use. Physical therapy interventions may include transcutaneous electrical nerve stimulation, progressive weight bearing, graded tactile desensitization, massage, and contrast bath therapy.
Notable cases
Nia Frazier, Dance Moms star
Paula Abdul, singer, actor, TV personality
Jill Kinmont Boothe, US ski slalom champion
Gemma Collis-McCann, British paralympic fencer
Shin Dong-wook, South Korean actor and model
Howard Hughes, American business tycoon, aviator, inventor, filmmaker, and philanthropist
Rachel Morris, British paralympic cyclist. Cynthia Toussaint, author and media personality
Danielle Brown, British paralympic archer
Radene Marie Cook, former Los Angeles radio broadcaster, artist, and advocate
Marieke Vervoort, Belgian Paralympic athlete
Bruno Soriano, Spanish footballer

References
External links
Complex regional pain syndrome at Curlie
Reflex sympathetic dystrophy at Curlie