Closed mouth acne on the chin can be removed by acne needles, medication and physical therapy. 1. Acne needle: acne belongs to mild acne, should avoid squeezing by oneself, so as not to lead to infection, if necessary, can be used by medical personnel, using sterile acne needles, open the follicular opening of the closed mouth acne, squeeze out the stagnant contents, and then disinfected. 2. Medication: drugs that promote the gradual normalization of follicular keratinization, such as adapalene gel, tazarotene gel, etc., can be used to help dissolve and discharge acne; isotretinoin can also be taken orally to inhibit keratinization of follicular sebaceous gland ducts and reduce the formation of keratosis pilaris. 3. Physical therapy: Fruit acid treatment can promote the exfoliation of the skin stratum corneum, accelerate cell renewal, and improve the skin acne problem; photodynamic therapy can destroy Propionibacterium acnes and reduce the inflammatory reaction. It is recommended that patients with closed mouth acne on the chin pay attention to the cleanliness of the facial skin and avoid the use of oily cosmetics as much as possible; they should eat a light diet and avoid spicy and stimulating foods; they should consult a doctor in time if necessary, and standardize the treatment under the guidance of the doctor, avoiding the use of medication in order to avoid delaying the condition.