There are many reasons for the redness of the cheeks after washing, such as allergic factors, thin skin stratum corneum, water temperature and so on. 1. Allergic factors: patients allergic to makeup remover, face wash and other cosmetics and skin care products, can cause redness in the cheeks after washing, and may also be accompanied by itching, redness and swelling and other phenomena, usually after discontinuing the use of gradual improvement. 2. Thin skin stratum corneum: If the skin stratum corneum is too thin, and the patient washes his face too hard, it can cause redness on the cheeks after washing, and it is recommended to avoid excessive cleansing in order to avoid damage to the skin barrier. 3. Excessive water temperature: The high temperature of the water used to wash the face can also lead to redness of the cheeks after washing, which is usually alleviated gradually after lowering the water temperature. There are many reasons for the redness of the cheeks after washing, it is recommended to go to the hospital in time and take standardized treatment according to the doctor’s instructions.