Common causes of frequent acne include endocrine factors, poor skin care practices, abnormal keratinization of follicular sebaceous gland ducts, and genetic factors. If you are addicted to spicy and oily food, bad dietary habits, long-term late night, excessive stress, long-term use of androgenic drugs, etc., can induce acne. 1. Endocrine factors: Increased androgen content in the body during puberty will lead to a large amount of oil secretion, providing a favorable environment for the growth of Propionibacterium acnes in the hair follicles. Propionibacterium acnes can hydrolyze the triglycerides in sebum into free fatty acids, which stimulates the formation of keratin in the ducts of hair follicles, causing obstruction of sebum excretion and the formation of acne. 2. Abnormal keratinization of follicular sebaceous gland ducts: Due to excessive keratinization of follicular sebaceous gland ducts, the ducts are blocked or the ducts become small, and the sebum and epithelial cells shed by the follicle wall cannot be discharged, thus acne can be formed. 3. Poor skin care: If the skin is not thoroughly cleaned, skin care products will remain on the face, leading to pore clogging and acne. 4. Genetic factors: acne has a certain family history. Daily attention should be paid to facial cleanliness and hygiene, eat a light diet, regular work and rest, do not stay up all night, in order to reduce the occurrence of acne. If acne is obvious and needs to be treated, it is necessary to consult a doctor in a timely manner and use medication under the guidance of a physician, do not use your own medication to avoid causing adverse consequences.