An increase in the frequency of bowel movements in children, accompanied by a change in stool characteristics, indicates diarrhea. When a child has diarrhea, the first step should be to test a stool routine to determine whether it is infectious diarrhea or non-infectious diarrhea. In cases of infectious diarrhea, antibiotics should be used under the guidance of a hospital doctor. If the diarrhea is caused by indigestion or rotavirus infection, symptomatic treatment is generally used. Firstly, feeding should continue. For children with watery stools, we should give them oral mucosal protectants, probiotics, and oral rehydration salts. For those with prolonged diarrhea, specifically diagnosed as caused by rotavirus infection, children should be supplemented with zinc for a period, as zinc can promote the repair of intestinal mucosal damage. This means that it can speed up the improvement of diarrhea, while also preventing the recurrence of diarrhea symptoms. (The use of medications should be conducted under the guidance of a professional doctor.)