Chin acne is often considered to be triggered by acne, the causes of which are related to sebum secretion, abnormal keratinization of sebaceous glands, inflammation and other factors. 1. Massive sebum secretion: If the sebaceous glands of the body are functioning vigorously, it will lead to massive sebum secretion, which will lead to chin acne. 2. Abnormal keratinization of sebaceous glands: If the sebaceous glands on the chin are abnormally keratinized, the opening of the hair follicles will be blocked and narrowed, and the local sebum and other substances cannot be discharged from the body, which may lead to recurrent formation of acne on the local area. 3. Inflammatory reaction: If the local Propionibacterium acnes bacteria multiply excessively, it may cause a local inflammatory reaction, which in turn induces inflammatory papules. There is no single cause of chin acne, so patients are advised to go to a regular hospital to clarify the cause.