The frequent growth of closed mouth acne on the chin is generally due to poor dietary habits, sebaceous gland secretion, keratinization of the follicle openings and other factors, and can be used to promote the recovery of timely facial cleansing, medication, and laser treatment. If the chin often long closed mouth acne, the first solution to consider is to carry out a more careful facial cleansing, the use of mild oil control cleansing products to wash the face, try to avoid the use of stimulating cleansing products to wash the face, with warm water for cleansing, avoid staying up all night, light diet. Secondly, medication can be considered, such as taking vitamin A to improve the abnormal keratinization of hair follicles, inhibit sebum secretion to fight against skin keratinization, and at the same time can consider using salicylic acid to clean the surface of the dry aged stratum corneum, clean up the blocked pores to regulate the skin. A few patients may experience breakouts. If necessary, you can also consider using laser treatment such as carbon dioxide laser heat effect, through high temperature vaporization of the tissue extrusion of the deep fat plugs dredge the hair follicles, or make closed acne into open acne, and then use negative pressure suction acne to achieve the therapeutic purpose. Closed acne should be treated in accordance with medical advice to avoid aggravation of the condition.