The production of acne is mainly related to the following factors: 1, androgens: androgen secretion increases during puberty, making sebum secretion hyperactive. Acne is likely to occur in teenagers. The sebaceous glands within the skin are very active during spring and produce large amounts of sebum. 2. Abnormal keratinization of hair follicles and sebaceous gland ducts: Keratinization of hair follicles and sebaceous gland ducts leads to impaired sebum excretion, sebum retention and acne formation. 3, microbial action: Propionibacterium acnes in the hair follicle and acne can multiply, producing lipolytic enzymes, proteolytic enzymes and hyaluronidase. Lipolytic enzymes break down the triglycerides in sebum into free fatty acids. Free fatty acids, proteolytic enzymes, and hyaluronidase stimulate the follicle funnel and acne sac wall, causing spongy degeneration and even the formation of tiny fissures. 4, inflammatory mediators and inflammation: the role of various inflammatory mediators and pathogenic factors, resulting in acne content through the tiny fissure into the dermis caused by perifolliculitis, the formation of inflammatory papules or pustules, perifolliculitis further expansion, inflammation and dermal connective tissue, causing inflammatory granuloma reaction, the formation of nodules. In severe cases, the healing process leaves scars. 5, genetics, diet, gastrointestinal dysfunction, menstruation, mechanical stimulation, cosmetics, etc. can also induce the disease. The pathogenesis of acne: Dried sebum, dander and bacteria accumulate in the skin pores to form acne, preventing sebum from flowing out of the hair follicle opening. If not completely blocked, blackheads form; if completely blocked, whiteheads form. The bacteria multiply in the pores and break down certain fats in the sebum, further irritating the skin. The irritated blackheads and whiteheads form a rash, often called an acne papule. If infection and irritation increase, abscesses can form. Daily care of acne 1. Thoroughly clean the skin. It is important to cleanse the skin. Use a neutral alkaline soap or a cleanser suitable for oily skin to wash your face every day. 2, avoid using oily or powder cosmetics, use water quality care products as appropriate, especially avoid heavy makeup. Before going to bed, you should thoroughly remove the day’s cosmetics, and avoid applying nutritional creams and ointments before going to bed, so that the skin at night is relaxed, unobstructed and fully breathes. 3, diet less fat, high sugar, spicy, fried food and white wine, coffee and other stimulating drinks, eat more vegetables, fruits, drink more warm water. Frequent constipation can be used mung beans 20 grams, 50 grams of barley, cooked into a porridge, add a small amount of rock sugar and blend, twice a day. 4, develop the habit of exercise, because proper exercise can promote metabolism, even a few minutes of gymnastics every day, is also able to maintain beautiful skin, people often have worries, and mental stress will also make the body sebaceous glands secretion, so we should do something to make their mood happy period, to lift the pressure of work and study every day. 5, avoid staying up all night, keep enough sleep. Whether at work or study, the latest do not exceed eleven o’clock, because the skin’s metabolism is usually carried out from eleven o’clock to two o’clock in the middle of the night, there is a sufficient sleep, to allow the skin to be properly maintained.