Generally about 3 days a bath is normal, but also consider the season, personal skin characteristics and the amount of sweat. 1. Season: 1 day bath in summer, can ensure that the skin is clean, but also can promote the whole body sweat gland. In winter, take a bath once every 4-5 days, and in spring and fall, take a bath once every 2-3 days. 2. Individual skin characteristics: If the skin is dry, sensitive, coupled with the dry season of fall and winter, you can reduce the appropriate frequency of bathing, after washing to apply moisturizing cream in a timely manner, to avoid excessive bathing, resulting in dry, itchy skin. 3. Sweating: If the activity is small, you can take a bath once every 4-5 days. If the activity is large or the indoor temperature is high, easy to sweat, you can shorten the interval between baths, 2-3 days to take a bath. It is recommended that the frequency of bathing be decided according to individual circumstances. Too much bathing will damage the cuticle of the skin, causing dryness, dehydration, itching and reducing the protective ability of the skin.