Acne is a chronic inflammatory skin disease that occurs in adolescents and young adults. It is most common in areas with rich distribution of sebaceous glands, such as the cheeks, forehead, and jaw, and can also involve the upper chest and back, and the neck. In recent years, prevalence surveys of acne have found that the incidence of acne among adolescents aged 11 to 25 is over 85%, and the incidence among young people aged 25 to 35 is over 15%. The causes of acne are mostly related to the elevated level of androgens and sebum secretion in the body, excessive consumption of spicy, greasy and sweet foods, work and study stress, frequent late nights and mental tension, and constipation. In mild cases, red papules, whiteheads or blackheads may appear, while in severe cases, pus, nodules and cysts may appear. Long-term and repeated inflammation may leave unsightly scars on the face and make the skin appear as pitting atrophy spots, affecting the appearance. In terms of treatment, there are many kinds of cosmetic products on the market to get rid of acne. After using them, acne not only does not heal, but also aggravates the condition, causing chronic dermatitis or pigmentation, and even the formation of scarring. According to the results of the Ministry of Health’s monitoring of cosmetic dermatology, acne is not only not cured, but the incidence of dermatological diseases caused by cosmetics is increasing year by year due to the illegal addition of banned or restricted substances in cosmetics or consumers with allergies, improper selection of cosmetics or improper use; exaggerated labels and instructions, misleading consumption, etc. Therefore, it is an important prerequisite to be seen in a regular hospital dermatology department. Patients with acne should pay attention to the following aspects: 1. Cleanse your face, wash your face with warm water 2-3 times a day, use medium-sized or alkaline soap or cleanser to remove excess oil from the surface of the skin, remove blocked aggregates from the pores, and allow sebum to be discharged normally. 2, Do not squeeze acne papules to avoid inflammation and infection, leaving scars and affecting aesthetics. 3.Eat less spicy stimulating and greasy food, eat more vegetables and fruits, drink more water, and keep your bowels open. 4.Treat patiently under the guidance of a doctor, do not use hormone drugs indiscriminately, and keep an optimistic mood. 5.Choose cosmetics suitable for you, should not use oily and modifying cosmetics.