In general, breastfeeding diarrhea is mostly seen in breastfed babies aged 0-6 months, with an increased number of stools, thin baby stools with a special sour smell, no pus or blood, no fever and other symptoms. It does not affect the appetite and growth of the baby. Breast milk diarrhea is mainly related to lactose intolerance caused by the lack of lactase in the infant’s body, and breast milk diarrhea can generally improve gradually as the baby adds complementary foods after 6 months. Some parents stop feeding their children breast milk after they find out that their children have breast milk diarrhea, and instead feed them formula, which is actually not advisable. Because breast milk is the best food for infants, infants will gradually adapt to the various components of breast milk, and the secretion level of lactase and lactase activity will gradually increase, and after a period of time, they will gradually be able to adapt to breast milk, decompose, digest and absorb the lactose in breast milk. It is important to note that babies with breast milk diarrhea should be allowed to suck the other side of the mother’s breast in time after the mother’s breast is empty. This is because when the accumulated milk in the breast is emptied, if the baby continues to suckle, the fat content in the newly secreted milk will increase, which may cause lipid indigestion and aggravate breast milk diarrhea.