When changing skin, if the skin reaction is strong and the fruit acid stays for a long time, the epidermis will loosen to some extent. At this time, it looks fat, and it will shrink to normal when it forms scab in a few days. About a week or so, the old skin or scab will fall off. During this period, you can't rub your skin with your hands and pay attention to sun protection. The scab is light brown or grayish brown, which is ugly, but please don't touch it with your hands until it falls off by itself.