Breast milk intolerance, usually referred to as lactose intolerance, can usually be reduced or suspended breast milk, with de-lactose milk powder or deeply hydrolyzed milk powder and other feeding. Breast milk contains lactose, if the newborn small intestinal mucosa lactase deficiency, will lead to milk lactose digestion and absorption obstacles and cause lactose intolerance, abdominal distension, diarrhea, abdominal pain and other symptoms, you can first reduce the amount of breast milk, increase the amount of de-lactose milk powder or deeply hydrolyzed milk powder. If there is no diarrhea after a small amount of breastfeeding, you can gradually increase the amount of breastmilk appropriately and gradually reduce the amount of milk powder fed, slowly transition to exclusive breastfeeding, and with the extension of time, most of them can gradually adapt. If a small amount of breastmilk still can not adapt, you can stop breastfeeding, choose artificial feeding, according to the degree of intolerance of the child to feed the child de-lactose milk powder or deeply hydrolyzed milk powder and so on. If in doubt, it is recommended to consult a medical professional.