After acid brushing, the skin can usually return to normal in 1 to 3 weeks. Acid brushing generally uses fruit acid and salicylic acid to act on the epidermal layer of the skin to promote the shedding of the aging stratum corneum and accelerate the renewal of epidermal cells. Depending on the concentration of the drug and the duration of treatment, the depth of the skin that can be stimulated is different, and the time of skin repair will also be different, generally 1 to 3 weeks of the corresponding level of the skin tissue can be repaired, to achieve the purpose of regulating the quality of the skin and improve the effect of the skin. Acid brushing is mainly used to treat acne, enlarged pores, acne marks and other conditions. In the initial period after treatment, there may be slight edema and crusting, so it is necessary to follow the doctor’s instructions to apply cold compresses, moisturize the skin, reduce make-up and other skin stimuli, and go out to strengthen sun protection. Acid brushing is a shallow chemical peeling means, generally 1 ~ 3 weeks the skin can be fully recovered, if there is a long period of redness, itching and other discomforts of the skin is recommended to timely follow-up by the doctor for assessment and treatment.