People’s ears protrude from the sides of the head, and the lack of subcutaneous tissue protection, coupled with poor circulation around the edges of the blood, in the cold weather is prone to frostbite. Frostbite parts of the beginning of itching, swelling, burning, pain, followed by localized redness, swelling or blisters ulcerated. Methods to prevent frostbite: 1, increase outdoor exercise, so that all parts of the body gradually adapted to the cold weather. 2, often wash your face with cold water to enhance the ability to resist the cold, the exposed part of the body should be coated with some grease to prevent freezing. 3, in the outdoor standing work, should be appropriate activities, in order to promote blood circulation. 4. Pay attention to the warmth of the ears and the whole body, especially the parts that have been frostbitten in the past, and pay more attention to keep warm in advance. After the occurrence of frostbite, you should gently rub the frostbitten place to promote blood circulation, so that the temperature will gradually return to normal. Never increase the temperature sharply. Localized frostbite can be coated with tincture of chili pepper and frostbite cream, and antimicrobials should be used on broken places to prevent infection. Ask your doctor for timely treatment.