Ear frostbite is a cold-induced limited inflammatory dermatosis of the periphery, a common winter disease characterized by congestive edematous erythema on exposed areas and itchy skin when exposed to high temperatures, and in severe cases, skin erosions and ulcers 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, although there are more methods, but rarely can be cured, so it is often difficult to feel. 1.Skin elasticity check The fluid content of the skin (blood, lymphatic fluid), the characteristics of the elastic fibers and muscle fibers and the tension of the nerve tissue are important factors in determining the level of skin elasticity. If the skin is well nourished and in good condition, it has a certain degree of elasticity. Clinically, the skin elasticity is reduced as one of the indicators to determine dehydration. 2, skin color Human skin color has six different, namely, red, yellow, brown, blue, black and white, such as yellow and white skin, red lips. Mainly due to the amount and distribution of melanin within the skin is different due to melanin is a protein derivative, brown or black, is produced by melanocytes. The amount, smallness, type and distribution of melanin are different, thus determining different skin tones. 3.Histopathology The epidermis and dermis are edematous. Blood vessels are congested and red thrombus formation is seen, followed by intimal hyperplasia and narrowing of the lumen. Skin attachment atrophy or degeneration. Adipose tissue shows crystallization and necrosis, sometimes with free and intracellular fat droplets in the blood vessels (a unique feature of frostbite). As the degree of frostbite increases, the degree of tissue cell degeneration and necrosis also becomes more severe, which may manifest as dry or wet gangrene histopathological changes.