Note the warm clothing to prevent cold, warm, outgoing available gloves, electric mattress sleep, less under cold water, reducing cold stimulation. Regulate the work of rest, do not fatigue, training their psychological quality, avoid emotional; strengthen dietary management, promising not smoke, do not drink. There are those who want to keep skin ulceration wound dry, clean and avoid contamination, can be partially with water, cleaning the wound Bromogeramine regular dressing for the early healing and, if infected, early, prompt treatment with antibiotics to prevent the spread.
     Renault sign medication primarily vasodilators, such as reserpine, methyldopa and nifedipine, enalapril, Lotensin, etc., but poor efficacy; also use partial closure or sympathectomy; There are also a dextran, Danshen solution venoruton, snake venom injection drugs lower blood viscosity reducer rule smell. There are people with a small dose of aspirin, dipyridamole, etc., inhibit platelet concentration, to reduce the role of Renault levy.