Acne is a chronic inflammatory lesion of the hair follicles and sebaceous glands related to sebum metabolism, and is commonly referred to as “acne” because it occurs during puberty. The onset of acne is related to the metabolism of sebum. As long as there is life, there will be sebum metabolism, so there will be the possibility of acne, but there are different incidences at different ages. It is highly prevalent during the developmental period of adolescence. [Causes of acne] 1. Excessive stress, sleeping too late, and emotional anxiety. 2, intake of too much sugar, dairy products, starch, fried food, fat, spicy and heavy food. 3, no good skin care habits, incomplete cleaning of the skin, pore clogging. Or over-cleaning, washing the face 3-5 times a day, resulting in lack of oil and water in the skin, instead of inducing excessive secretion of sebaceous glands. 4, Self-needle acne clearance or squeeze acne, resulting in pore infection, dermal inflammation, causing scarring. 5, endocrine changes, some women’s premenstrual acne aggravated, accompanied by dysmenorrhea and so on. Precautions] 1. Contraindicated foods: fatty, sweet and greasy, sweet drinks, fried foods, fat, dairy products. 2, suitable food: seafood (rich in polyunsaturated fatty acids, can reduce the secretion of sebum, anti-inflammatory), red vegetables (such as carrots and tomatoes, both should be cooked, otherwise not easily absorbed), high-fiber vegetables (such as celery, cabbage, etc.). 3, skin carefully clean skin, use oil control and moisturizing cleanser to reduce the clogging of hair follicle pores. It is not easy to wash your face more than 3 times, and you must use oil-controlling moisturizing milk after cleaning to reduce the secretion of oil. 4. For mature acne, pustules and cysts, puncture and drainage are performed under strict aseptic conditions. 5. If there are more inflammatory acne and the skin is sensitive, you should use masks and creams with soothing effects. 6. Acne skin is prone to acne and scarring under the action of ultraviolet rays, so it is recommended to use medical skin care products sunscreen.