If breast milk diarrhea does not affect the growth and development of the baby, there is no need to treat it with medication. However, there are children with frequent and unformed stools that are not related to breastfeeding, but are accompanied by other factors such as improper feeding or allergies, and can affect the growth and development of the child. If the family is unable to determine this situation, the child should be sent to the hospital for relevant tests to determine if the diarrhea is simple breast milk diarrhea and if it requires probiotics or intestinal mucosal protective drugs such as montelukast, as well as appropriate rehydration therapy. Breastfeeding diarrhea is not a disease and is most often seen in infants who are mainly breastfed. Breastfed children have relatively thin and more frequent stools, which is related to the structure of breast milk. The need for intervention and treatment of such stools, which are frequent and unformed, is mainly based on the baby’s weight gain and mental state during growth.