Frostbite is a relatively common skin disease caused by cold weather that results in recurrent localized erythema, swelling damage, and in severe cases, blisters and ulcers. Frostbite occurs on the ends of the extremities, face, nose and ears, and is symmetrically distributed and self-induced itching. It has a slow course, heals itself when the weather turns warm, and is prone to recurrence. Cold is the main cause of frostbite, and stimulation by humidity and cold wind can aggravate the condition. The pathogenesis of frostbite is that the cold causes the small arteries in the skin to contract for a longer period of time, resulting in paralysis of the small arteries, venous stasis, and the onset of local circulation disorders. The patient’s own causes, such as poor peripheral blood circulation, nerve dysfunction, moist skin, and endocrine disorders, are also involved in the pathogenesis. In addition, lack of exercise, tight shoes and socks, and working in a cold environment for a long time can promote the development of frostbite. Since there is no satisfactory treatment for frostbite once it occurs, the majority of patients have a long course of the disease, which only gradually heals itself when the weather warms up in the spring, causing significant physical pain to patients and affecting their lives and work. Therefore, prevention of frostbite is important. Friends who often suffer from frostbite should take the following measures to prevent it from autumn onwards. 1.Adhere to sports, especially outdoor sports, to enhance physical fitness and improve the body’s ability to withstand cold. 2. Starting from autumn, you can irradiate local skin with infrared light at home (using a home infrared meter) or at a hospital dermatology department to promote local blood circulation. 1 time a day, 15-20 days a course of treatment, can irradiate more than one course of treatment. 3. After the weather turns cool, wear gloves, masks and warm shoes to protect frostbite prone areas, do not make gloves and masks too tight, and choose straight gloves. 4. Massage the frostbite prone areas frequently for 15-20 minutes each time. 5.People with other related system diseases should be treated actively. 6.After the occurrence of frostbite, go to the hospital in time to alleviate the development of the disease.