A. Acne is a chronic inflammation of the sebaceous glands of hair follicles. A series of abnormalities lead to the occurrence and development of acne, mainly including: 1. androgen stimulation of sebaceous gland function and increased sebum production; 2. abnormal keratinization of the follicular funnel of the sebaceous gland blocking the follicular opening; 3. active bacterial reproduction in the sebaceous gland unit of the follicle, especially Propionibacterium acnes; 4. local inflammation and the occurrence of an immune response. Second, in order to choose the most appropriate treatment plan, acne is divided into different grades of light, moderate and severe. 1. Light (Grade I): Acne is the main lesion, there may be a small number of papules and pustules, and the total number of lesions is less than 30; 2. Medium (Grade II): There is acne with a moderate amount of papules and pustules, and the total number of lesions is between 31 and 50; 3. Medium (Grade III): There is acne with a large number of papules and pustules, and occasionally large inflammatory damage with a wide distribution, and the total number of lesions is between 51 4. Heavy (Grade IV): In addition to the above-mentioned rashes, there are nodules and cysts, most of which are painful and form cysts, with more than three nodular cysts. Third, the treatment of acne, mild (grade I) acne: treatment is mainly aimed at eliminating acne. The second is aimed at a few inflammatory papules as well as the purpose of debridement. In order to prevent recurrence, anti-keratinizing drugs can be applied frequently after the lesions have completely faded for 4 to 6 months of maintenance treatment. Severe (Grade IV) acne: In addition to the same treatment as moderate Grade III acne, the treatment with internal medication is strengthened, and the course of treatment is generally 8 to 12 weeks, followed by a reduction of medication to maintain treatment for 6 months. From the above, we can see that in order to prevent acne from recurring, acne patients should adhere to the treatment, and generally maintain treatment for 4 to 6 months after the lesions have subsided, so that there will be satisfactory results. Fourth, patients should maintain an optimistic mood, have confidence in the treatment, and actively cooperate with the treatment so as to achieve the best results. Fifth, the occurrence of acne is related to excessive consumption of fatty, sweet and spicy stimulating foods. Therefore, acne patients should pay attention to their daily diet and appropriately limit the intake of oily, spicy, sweet and other foods. Daily care: 1. Hand squeezing is strictly forbidden; 2. Prevent constipation and keep the stool usually; 3. Maintain emotional stability and get enough sleep; 4. Use cosmetics selectively and refrain from using oily cosmetics to avoid blocking pores and aggravating acne. 5, in the hot and humid season or environment to try to reduce the amount of sweat gland secretion to alleviate acne. 6, acne patients should also protect themselves from the sun.