"The popular brush acid is actually a kind of chemical peeling, also called chemical peeling." Dr. Qiu Xiangning said that brush acid smeared chemicals on the skin surface, which caused controllable skin damage in different degrees and promoted new skin regeneration. The type, concentration and residence time of chemicals on the skin will affect the depth of skin replacement. Chemical skin replacement can be divided into shallow skin replacement, middle skin replacement and deep skin replacement according to depth. The deeper the skin changing effect, the more obvious the effect, but the greater the probability of adverse reactions.

"brush acid is a formal medical behavior, and it is risky to go to brush acid at home." Dr. Qiu Xiangning said that the concentration of "acid" used in brush acid was high, which had certain irritating and damaging effects on the skin. With the increase of "acid" concentration and the extension of residence time, the risk of adverse reactions increases. During the treatment, redness, swelling, tingling, burning pain and other discomforts may occur in the treated area, and scabbing and pigmentation may occur after the operation. In addition, there are rare burns, erosion, exudation and abnormal pigments. If you don't have professional knowledge, you can easily burn your skin by yourself.

"As a highly irritating means of medical beauty, brush acid is suitable for people with healthy skin barrier and thick cuticle." Dr Qiu Xiangning suggested that brush acid should be conducted in a hospital or clinic with medical qualifications. Trained professionals should choose the appropriate type and concentration of "acid" according to the patient's skin condition, and accurately judge the treatment response during the operation. After brush acid's treatment, don't wear makeup for the first three days. It is recommended to wash your face with clean water and use mild moisturizing repair products. After the skin condition is stable, you can resume the normal skin care process. Don't use other exfoliating agents after treatment, and avoid rubbing the treated area hard. Avoid spicy food and high temperature environment within 7 days after operation. In addition, brush acid should have strict sun protection after treatment.