Inflammatory papular acne is mainly related to androgens, Propionibacterium acnes infections and secondary inflammatory damage, but also related to emotions, diet, genetics and so on. 1. Inflammatory papular acne can occur at all ages, and is more common during puberty. One of the reasons for this is the excessive secretion of androgens or an imbalance of estrogen and male hormones in the body. Androgens can stimulate sebaceous gland secretion and hyperplasia, sebaceous gland if there is Propionibacterium acnes and other infections, will hydrolyze the triglycerides in sebum to free fatty acids. Free fatty acids stimulate hyperplasia and hyperkeratosis of sebaceous gland opening cells, leading to narrowing of the opening and accumulation of sebum and keratin in the sebaceous glands, resulting in the formation of acne. 2. Free fatty acids can also stimulate an inflammatory response in hair follicles. Neutrophils chemotaxed by Propionibacterium acnes also exacerbate inflammation, destroying hair follicles and causing lesions. Acne and inflammatory substances in the hair follicles can lead to limited elevation of the skin and papular manifestations. 3. Heredity, immunity, endocrine, emotion, diet, etc. are also involved in the occurrence of inflammatory papular acne, such as emotional outbursts, consumption of spicy and oily food, etc. will induce the production of acne. It is recommended that patients pay attention to face cleaning, can be used under the guidance of the doctor Vitamin A acid cream, benzoyl peroxide and other medications, if necessary, should be combined with oral medication. Therefore, it is recommended that patients consult a professional doctor for standardized diagnosis and treatment in a timely manner.