Intact skin is the body’s natural barrier against various external substances or stimuli. Therefore, when the skin has vesicles, blisters, ulcers, scratches or minor injuries and other skin barrier function is impaired, you should try to avoid bathing and exposure to chemical stimuli such as soap and laundry detergent, so as to facilitate the recovery of skin diseases. The sebaceous glands of the skin secrete a small amount of sebum to moisturize the skin, but in winter because of the dry climate, frequent bathing and old age and other factors often dry skin and itching. Therefore, it is recommended that patients with dry and itchy skin pay attention to less bathing, less shower gel, less rubbing, less washing with too hot water, and can immediately use topical moisturizing skin care products after bathing.