Sudden acne on the face is called acne in clinical practice. It may be due to endocrine disorders, improper cleaning, improper diet or the patient’s own poor resistance and other susceptibility to infection. Etiological diagnosis according to clinical symptoms is required before treatment: 1. Endocrine disorders: Some women are likely to have a sudden increase in acne before their menstrual period, and this is mainly related to fluctuations in the level of sex hormones in the body. Excessive secretion of androgens in the body leads to a relatively strong secretion of facial oil, and a large amount of sebum inside the hair follicle mouth will lead to increased facial acne; 2, improper cleaning: cosmetics, facial cleansers or soaps containing fatty acid salts, oily or poor quality skin care products and foundations may clog pores, thus triggering acne; 3, improper diet: eating too much spicy, greasy food or drinking a lot of alcohol, resulting in facial 4. Poor resistance: Patients with low resistance are prone to acne when Propionibacterium acnes multiplies, leading to sudden facial acne. Irregular work and rest, frequent late nights, lack of sleep, emotional anxiety, irritability, etc., may lead to a decline in the body’s immunity, which is more likely to lead to acne flare-ups. If facial acne is red and inflamed, you can use anti-inflammatory ointments, such as fusidic acid cream, or topical benzoyl peroxide, which has the ability to kill Propionibacterium acnes, dissolve acne and astringent effects. The above medications should be used under the guidance of a doctor after an interview and should not be used on your own.