The main reasons for long-term acne are the following: 1. Young men and women enter puberty and androgen excitation related to androgens can lead to sebaceous gland follicle wall keratinization and blockage of pores, resulting in poor sebum discharge, thus causing inflammation of the follicle sebaceous glands, the formation of acne, that is, acne. 2. usual eating habits, love to eat sweets, love to eat spicy stimulating food, love to eat greasy big fish and meat. 3. usually like to stay up late on the Internet, are indirect causes of acne. The reason for this is that you like to stay up late and surf the Internet. 3, the generation of acne and facial acne bacillus infection, some people have poor bowel movements, which are indirect causes of the formation of acne, endocrine disorders, facial skin oil secretion is high. For oily skin to clean the face every day, make warm water cleaning 2-3 times a day, and then wipe skin care products to keep the face clean and prevent the occurrence of acne.