Acne is generally referred to as acne and should be improved by general treatment, application of medication (azelaic acid cream, etc.), and phototherapy, depending on the severity of the acne. 1. General treatment: Regardless of the severity of acne, it is necessary to pay attention to life management. In terms of diet, you should eat less high sugar and spicy food; you need to ensure enough sleep and avoid excessive late nights; avoid using oily cosmetics or skin care products to avoid clogging of pores. 2. Application of drugs: Mild to moderate acne can generally be treated with medication, commonly used drugs such as vitamin A cream, azelaic acid cream. If acne is more serious, oral isotretinoin can be used, and if accompanied by inflammation and infection, antibiotic drugs such as fusidic acid cream can also be applied. 3. Phototherapy: For patients with mild to moderate lesions, phototherapy can be used to improve the inflammatory response to acne, such as combined red and blue light irradiation. Patients with acne should seek medical advice and treatment under the guidance of a doctor.