The face forms a closed environment due to the wearing of a mask, and the skin becomes moist and bacteria breed, causing acne to worsen. If mild acne occurs, topical vitamin A acid ointment (used before bedtime) can be used; if acne worsens, topical antibiotics such as fusidic acid ointment and mupirocin ointment can be used. In cases where the flow of people is not particularly high, the use of a medical surgical mask is sufficient. Avoid too heavy makeup, enhance facial ventilation, avoid using moisturizing skin care products, take off the mask promptly after going home, and clean your face well.