Excessive acid brushing can be characterized by localized skin swelling, stinging and irritation. Acid brushing is a common cosmetic skin treatment that can soften aging keratin and shrink pores. However, if you brush the acid should be moderate, if you brush too much acid, it is easy to cause damage to the skin, such as damage to the epidermis of the skin, resulting in thinning of the stratum corneum, making the skin dry and red, and easy to tingle, and will lead to localized redness and swelling, and may even have the phenomenon of acne. Acid brushing excessively may also lead to skin allergies, so that the skin becomes sensitive skin. Brush acid must go to the regular hospital operation, and to avoid excessive, so as not to cause damage to the skin, after the operation must be good care, to avoid infection, but also to strict sun protection.