There are many reasons for acne formation, including endocrine disorders, abnormal keratinization of the sebaceous gland ducts of hair follicles, and poor skin care habits. 1. When endocrine disorders lead to an increase in androgen content in the body, the sebaceous glands will secrete a large amount of oil. In addition, sebaceous glands contain a large number of androgen antibodies, and androgen receptor affinity abnormalities can also lead to increased sebaceous gland secretion, resulting in the formation of acne. 2. Hyperkeratosis of the follicle sebaceous gland ducts can lead to narrowing or blockage of the ducts, which in turn leads to the follicle wall of the epithelial cells and sebum can not be discharged normally, resulting in the formation of acne. 3. If you wash your face too often and too vigorously, the skin barrier will be damaged, which will easily lead to the formation of acne. In addition, usually skin cleaning is not thorough, or do not pay attention to sunscreen, can lead to pore blockage caused by acne.