Dry skin lacks moisture and sebum, causing the skin surface to become parched and potentially leading to severe tightness. If left untreated, dry skin can be significantly damaged during seasonal changes. After cleansing, replenish moisture with a highly moisturizing product; cleanse lightly before going out during the day, and pay attention to skincare after cleansing at night. You should choose a non-irritating cleanser, and exfoliating with a scrub once a week is also a good method.