Acne in the summer and not in the winter is generally related to dietary habits and the season. Medically speaking, acne is mainly related to the level of androgens in the body, excessive facial oil production, and abnormal keratinization of the sebaceous ducts of the hair follicles or infection by Propionibacterium acnes, as well as diet and staying up late. In general, in summer, people stay up late and eat more barbecues. In addition, in summer, the weather is hotter and the face sweats and produces more oil, which leads to abnormal keratinization and blockage of the ducts of the sebaceous glands of the hair follicles, so acne is more serious in summer. In winter, the face is less oily and less sweaty, so there is less acne. In addition, according to Chinese medicine, summer is the main fire, the main damp, the body more damp heat patients, usually more serious summer acne, then you can take oral Chinese medicine to regulate.