Children's diarrhea can be classified into infectious and non-infectious types. Generally, if it is infectious diarrhea, it is crucial to provide a light and easily digestible diet. If the infant is breastfed, continue breastfeeding, but the mother's diet should also be light and easily digestible. If the child is formula-fed, you can feed them diarrhea-specific formula and gradually add some supplementary foods such as thin porridge, noodles, and fruit juice. However, greasy and hard-to-digest foods should be avoided as much as possible, and this applies to older children as well; they also should not consume fatty and spicy foods. Additionally, foods that are hard to digest should be avoided to aid in the recovery of the condition. If it is non-infectious diarrhea, for example, caused by allergies to milk or eggs, avoid consuming these allergenic foods. In cases of lactose intolerance causing diarrhea, avoid lactose-containing milk powder; switch to diarrhea-specific formula instead.