The acne on the face has turned into a black mole, which is considered to be blackhead acne, caused by oxidized fat plugs, and can be treated by general treatment, topical medication, and chemical peeling. 1. General treatment: choose water or suitable cleansing products, remove excess oil on the skin surface, pay attention to oil control and moisturizing, and use mild moisturizing milk. Avoid squeezing and scratching the lesions with hands. Limit the intake of high glycemic index foods and milk, which may trigger or aggravate acne, keep bowel movement smooth, and avoid staying up late at night. 2. Topical medication: Topical retinoids such as tazarotene can be used, and benzoyl peroxide can also be used externally. 3. Chemical exfoliation: Fruit acid, salicylic acid, hydroxyacetic acid and other exfoliators can be used to assist in the treatment. Patients with blackheads and acne should consult a doctor for standardized treatment under the guidance of the doctor. The medication should be used in accordance with the doctor’s instructions, do not self-medicate.