Acne caused by late nights usually recovers in a week to a few months after sleep adjustment, but the time to fade differs significantly for different types of acne lesions. Acne recovery is usually affected by a variety of factors, such as the type of lesion, sebaceous gland secretion status, genetic susceptibility, body androgen levels and mental state, lifestyle and diet habits and structure, and the use of skin care products and cosmetics. Generally, closed acne and blackhead acne fade more slowly and usually do not leave acne marks after fading; inflammatory papules can be relieved in about 1 week, but may leave red acne marks; cystic acne and Cystic acne and hard nodules have deeper damage and fade more slowly, often taking several months. Since skin repair time is mainly between 10:00 p.m. and 5:00 a.m. at night, patients are advised to avoid staying up late. It is also advisable to eat a healthy diet and to ensure a happy mood and adequate sleep. In addition, proper skin care can play an important role in acne treatment and in preventing recurrence.