The types of acne (i.e. acne) are common acne, polymerized acne, and eruptive acne. 1. Acne vulgaris: Acne vulgaris is a chronic inflammatory disease of the sebaceous glands of the hair follicles that is common in adolescence, mostly occurring on the face, with the basic damage being pimples, papules or pustules, often accompanied by seborrhea. The cause of the disease is related to increased sebum production and hyperkeratosis of the epithelium at the mouth of the follicle. 2. Acne vulgaris: Acne vulgaris is characterized by severe nodules and cysts and belongs to a special type of acne that usually develops on the basis of common acne. Acne can develop into inflammatory papules, pustules, nodules, and cystic changes. 3. Eruptive acne: Eruptive acne manifests as multiple follicular papules, pustules, vesicles, etc., which can occur on the face, neck, chest, etc. Patients may also be accompanied by fever, arthralgia, etc., and may leave behind hyperpigmented spots and superficial scarring.