With the improvement of living standards, whether in cities or rural areas, more and more people are making skin care products. Skin care products are daily chemical industrial products that are applied to any part of the human surface (skin, hair, nails, mouth and lips, etc.) by rubbing, spraying or other similar methods to achieve the purpose of cleaning, eliminating bad odor, skin care beauty and grooming, and in most cases, cosmetics applied to the face. Some people develop dermatitis after exposure to cosmetics, with lesions confined to the contact area, clearly defined, with erythema and papules in mild cases, and edema, vesicles, and oozing crusts in severe cases. Itching, burning or painful local lesions can be felt, but the rash can quickly improve or heal after discontinuing cosmetics. However, there are also individuals who use cosmetics, the primary lesions can be confined to the contact area, but can spread to the surrounding or distal areas, with a variety of lesion patterns, itching, dermatitis, erythema and scaling, head and facial redness, eye inflammation, hands and other parts of the body can also have urticaria-like reactions, and some people may also develop cosmetic acne, cosmetic photosensitive dermatitis and cosmetic skin pigmentation. Cosmetic dermatitis can be caused by the quality and composition of cosmetics as well as by your own body. Generally speaking, according to the characteristics of individual skin to choose high-quality and non-irritating cosmetics, not blindly rub with high-grade cosmetics with complex ingredients, some cosmetics contain hormones, long-term use, more beneficial to the human skin, can cause skin atrophy, capillary dilation, facial pigmentation. Therefore, try not to use several cosmetics at the same time, so as not to cause cross-allergies.