Facial frostbite is damage to the skin of the face caused by cold irritation. Injuries caused by low-temperature cold intrusion are called frostbite. Frostbite can be localized or generalized (frostbite, mostly due to cold, humidity, tight clothing and shoelaces, often occurs on the skin and hands, feet, fingers, toes, ears, nose, etc.). Frostbite is divided into four degrees, and patients can diagnose face frostbite according to the clinical manifestations of the four degrees of frostbite. Diagnosis of frostbite on the face: The first degree of frostbite is the lightest, and also both common “frostbite”, damage in the epidermis layer, the frozen part of the skin is red, swollen and congested, conscious of heat, itching, burning pain, symptoms disappear after a few days, after healing, except for epidermal gel fall, no scarring. Second-degree frostbite injury and superficial dermis, after the injury, in addition to redness and swelling, accompanied by blisters, the bubble can be bloody fluid, deep edema can appear, severe pain, dull skin sensation. Third-degree frostbite injury and the whole layer of the skin, appear black or purple-brown, pain and sensory loss, the injury is not easy to heal, in addition to scarring, there may be long-term sensory sensitivity or pain. Fourth degree frostbite injury to the skin, subcutaneous tissue, muscle and even bone, may appear necrosis, loss of sensory entrapment, healing may have scar formation.