Ear frostbite is a cold-induced limited inflammatory skin disease of the periphery, a common disease in winter, characterized by congestive edematous erythema on exposed areas, itchy skin when exposed to high temperatures, and in severe cases, skin erosion and ulceration may occur. The disease has a long course and recurs in winter, which is not easy to cure. For some young women, it not only affects the beauty of their hands, but also brings great inconvenience to their lives. In terms of treatment, there are many ways to treat it, but it is rarely curable, so it is often difficult to treat. The main cause of ear frostbite is prolonged exposure of the body to an environment below 0°C. Prolonged exposure to cold, local humidity, decreased systemic resistance, trauma or bleeding, prolonged immobilization of the frozen person, and accelerated heat dissipation due to peripheral vasodilatation after alcohol abuse can promote cold damage to the body. In addition, the elderly and young children are susceptible to this disease because of their poor thermoregulatory response. When the local skin is stimulated by the environment, the blood vessels contract strongly, leading to tissue ischemia. As the temperature continues to drop, the tissue freezes, rapidly forming intracellular ice crystals and slowly freezing to form intercellular ice crystals. As a result of ice crystal formation, the intra- and extracellular microenvironment is altered, cells are dehydrated, and the concentration of intracellular electrolyte enzymes, sugars, etc., increases. Free from freezing, during rewarming, blood vessels dilate, blood enters the dilated microvasculature and quickly sludges, exudate increases, and edema forms. Plasma extravasation and blood concentration lead to thrombosis and microcirculatory disorders, making the tissue more ischemic and even leading to tissue necrosis. At the same time, due to the increased tissue metabolism and increased oxygen demand, it is more likely to cause degeneration and necrosis of tissue cells. Therefore, the degree and extent of frostbite can only be observed after several days. An accurate judgment can be made. In addition, different tissues have different tolerance to cold, and it is generally believed that nerves, blood vessels and muscles are the most sensitive, skin, muscle membranes and connective tissues are the next most sensitive, and bones and tendons are the most resistant to cold.