Some cosmetics are actually associated with acne, and sometimes the use of cosmetics can cause acne. For example, acne caused by actors using oil paints is one type of acne, called cosmetic acne. Acne is the most common disease in dermatology. It occurs in adolescent males and females and tends to reduce or heal naturally after youth. This disease is most commonly seen on the cheeks and around the mouth in women. The lesions are mostly closed pimples and pustules because certain ingredients in cosmetics can block the ducts of the hair follicles and sebaceous glands, so sebum cannot be discharged and pimples appear. In men, it can occur on the scalp, forehead, temporal region and face, and the lesions are mainly closed pimples. The first point of clinical treatment is to stop the cosmetics suspected of causing the disease, treat it appropriately, and discontinue the use of cosmetics can subside.