Recurrent acne on the cheeks and chin refers to recurrent acne growth, which is usually associated with endocrine disorders (elevated androgen levels), exuberant sebum secretion, bacterial infections, abnormal keratinization of sebaceous glands, inflammation and other factors. 1. Exuberant sebum secretion: the development of sebaceous glands has a greater correlation with androgen levels. When the level of androgens in the body increases, the sebaceous glands will function exuberantly, leading to a large amount of oil secretion. 2. Abnormal keratinization of sebaceous glands: Abnormal keratinization of the cells around the hair follicles will lead to the follicle openings becoming smaller, narrower, and blocked, which results in sebum not being able to be discharged, resulting in the formation of acne visible to the naked eye or micro-acne that is invisible to the naked eye. 3. Overproliferation of Propionibacterium acnes: Propionibacterium acnes can promote the expression of Toll-like receptors in keratinocytes, sebaceous gland cells and monocytes, and can also hydrolyze triglycerides in sebum to produce free fatty acids, which in turn stimulates inflammation of the hair follicle and its surrounding tissues. 4. Inflammation: Sebum overflow leads to an increase in the reproduction of Propionibacterium acnes, which infects the skin with varying degrees of inflammation, leading to a series of symptoms ranging from inflammatory papules to cysts. In addition, heredity, psychological stress, and autoimmunity can also affect the formation and development of acne. It is recommended that patients go to the dermatology department of a regular hospital and receive treatment under the guidance of a doctor and in accordance with medical advice.