Closed mouths on the face are whiteheads, a type of acne, and you can visit a dermatologist. Acne is a chronic inflammatory skin disease of the sebaceous gland units of hair follicles. Generally with the change of hormone level in the body, androgen level increases or the imbalance of male and female hormone level, resulting in a large amount of sebum secretion, which provides a good environment for the growth of microorganisms such as Propionibacterium acnes in the hair follicle, the germs hydrolyze triglycerides in sebum to free fatty acids, promote keratin production, and eventually form pimples, inflammatory papules, cysts and other manifestations. Acne belongs to the dermatological diseases, you can go to the hospital to see the dermatology, after diagnosis, under the guidance of the doctor reasonable treatment. Clinical treatment is mainly based on drug therapy, and the principle of treatment is to remove sebum, dissolve keratin, sterilization, anti-inflammatory and regulate hormone levels. It is recommended that the patient under the guidance of professional physicians reasonable treatment, usually pay attention to skin hygiene.