Closed acne, also known as whitehead acne, is related to endocrine factors, and in addition to some bad habits. 1. Endocrine factors: after puberty, androgen levels will increase, causing a large amount of sebum secretion, if the sebum can not be completely discharged, the skin follicles will be blocked by the accumulation of sebum and stratum corneum cells, at this time, Propionibacterium acnes will be overpropagated, resulting in inflammation of the skin follicle funnels, the formation of whiteheads acne. 2. Bad habits: Some bad habits can also cause an increase in skin oil, resulting in the appearance of whiteheads and pimples, the more common is to stay up late for a long time, mental stress, pay attention to personal hygiene, high-calorie diet and the use of poor-quality cosmetics and so on. To remove closed pimples, it is important to pay attention to: removing makeup and cleansing thoroughly, exfoliating regularly, hydrating and moisturizing, and squeezing pimples in the right way (it is recommended to find a professional doctor to deal with it). If closed acne is diagnosed, early and standardized treatment is recommended to minimize the adverse effects of the disease.