The reason for acne on the face in hot weather may be due to the fact that the sebaceous glands are active and produce a lot of oil after the face sweats more in hot weather. In this case, it is necessary to keep the face clean and hygienic during the heat of the day to prevent the aggravation of acne. The occurrence of acne is also related to several factors, such as increased secretion of androgens, increased secretion of sebaceous glands, infection by Propionibacterium acnes, and the involvement of inflammatory molecules around the sebaceous glands of hair follicles, resulting in inflammation of the sebaceous glands of hair follicles, so that acne can occur.