Acne is clinically divided into blackhead acne and whitehead acne, where blackhead acne is open acne and whitehead acne is also called closed acne, which are often encountered in clinical practice. The reason for its formation is mainly related to the blockage of the sebaceous ducts of the hair follicles, and the following methods are mainly used in hospitals: 1. topical retinoids, such as adapalene gel, retinoic acid cream, tazarotene gel, etc. 2. direct treatment by acne needle picking. 3. chemical peeling methods, such as the most commonly used fruit acids, and salicylic acid, which have emerged in recent years, have a The effect is relatively good.