Whether or not acid brushing improves the skin needs to be analyzed on a case-by-case basis. Acid brushing is mainly used to partially exfoliate the stratum corneum through the exfoliating action of professional therapeutic concentrations of salicylic acid or fruit acids, thus promoting the shedding of melanin particles and stimulating collagen reorganization. It can achieve lightening of pigmentation, brightening of skin tone, improvement of fine lines, and can also assist in the treatment of acne, seborrheic keratosis, and other skin diseases. If the skin is sensitive or the skin’s stratum corneum is thin, acid brushing may damage the original skin barrier, which may cause the patient to develop persistent erythema, edema, contact dermatitis, and so on. It is recommended that patients under the guidance of a professional doctor for acid brushing, after acid brushing should pay attention to moisturizing and sun protection, to avoid the legacy of post-inflammatory hyperpigmentation.