Frostbite is caused by a combination of internal and external factors. The internal factor is a slower metabolism and poorer local blood circulation, which occurs at the ends of the extremities, such as the hands, feet, ears and other areas with insufficient blood supply. The external cause is cold irritation, especially in cases of intense alternation between hot and cold. So the treatment of frostbite starts with getting rid of the causes: 1. Improve the metabolic level to strengthen exercise, such as running and swimming, develop fitness habits, and eat more hot foods such as beef and mutton, goose meat and leeks as appropriate. Note that alcohol is not included in this list. 2, improve local blood circulation such as more massage, friction, or the use of topical drugs to help local blood circulation (heparin sodium ointment, Xylitol, etc.). 3, get rid of cold stimulation to do a good job of warmth, try to wear more layers, before each layer should pay attention to leave a certain air layer, conducive to insulation and warmth. You can add ear muffs, masks, gloves, etc. to keep warm. Shoes as large as possible half size, better warmth, the principle of the same clothes reserved air layer, the sole should be as thick as possible, wear cotton sweat-absorbing breathable socks, if the socks or insoles are wet, should pay attention to replace, bake dry, keep dry. Especially when just returning from the cold outdoors to the warm indoors, drastic changes in heat and cold can easily induce frostbite. 4. If topical medication is not effective, consider physical therapy such as red and blue light. Frostbite is one of the most common diseases in winter and is easily recurring, so it is more crucial to prevent it every year.