The first thing is to remove the cause of the child’s diarrhea, for example, he is pulling a dilute watery stool, we should give him some easy to digest food. At the same time, the stool routine, such as no bacterial infection, we can give him some easily digestible food, but also eat some probiotics, such as autumn diarrhea or viral diarrhea can be added with antiviral drugs, such as ribavirin granules. Then, you can topically apply a little bit of buttocks protection medicine, such as compound cod liver oil ointment or rehabilitation new liquid, which can have a certain protective and repairing effect on the skin of the buttocks.