Eyebrow tattooing is a cosmetic surgery method in which metallic or vegetable pigments are applied by piercing the skin to penetrate under the dermis and then permanently maintain the shape of the eyebrows. The hazards of eyebrow tattooing mainly include skin allergy, local skin infection, pigmentation, scarring and so on. 1. Skin allergy: During the process of eyebrow tattooing, if the color material is not properly selected, especially when the color material with strong irritation is used for eyebrow tattooing, skin allergy phenomenon such as redness, swelling and rash may appear on the affected area. 2. Local skin infection: usually, under the operation of professional doctors in regular medical institutions, this project will not cause serious harm to the body, but local skin disinfection is not complete, operation is not standardized, improper care, etc. can cause local skin infection, and in serious cases, pus and skin necrosis will occur. 3. Pigmentation: If the eyebrow tattoo material is used improperly or unqualified pigment is used, pigmentation may occur after improper care. In addition, if the doctor operates improperly and damages the hair follicles under the skin, it can cause the growth of eyebrows to be disorganized, further affecting the overall image of eyebrows. 4. Scarring: Tattooing is an invasive operation, if the aseptic conditions are not good during the tattooing process, or infection occurs during the healing process, it may lead to scarring of the wound. It is recommended that patients go to regular hospitals for this kind of medical aesthetic program, and strictly follow the doctor’s instructions for care.