As acne patients have greasy skin, most patients have the bad habit of over-cleaning their skin and frequently use soap or acne cleanser to cleanse their face. The soap salts in soap can easily lead to edema of the stratum corneum and loss of natural moisturizing factors, which can damage the skin barrier function. Frequent use of hotter water to wash the face can make the skin surface lipid loss and affect the skin barrier function. Frequent exfoliation: mainly using scrub-type cleansers or exfoliating creams, etc. This can lead to frequent exfoliation of the stratum corneum, which can damage the skin barrier structure. Some acne patients have misconceptions about skin care, believing that using lotions and emollients will aggravate the oily state of the skin without using skin care products. If you overclean your skin and do not use skin care products, the damaged skin barrier will not be repaired in time.