Lactose intolerance in newborns usually manifests itself in symptoms such as diarrhea, bloating, and change in stool pattern, which need to be treated by switching to lactose-free milk powder or adding lactase enzyme. Lactose intolerance in newborns is mainly due to a decrease or lack of lactase secretion in the intestinal tract of newborns, the lactose in breast milk or milk powder can not be broken down, and then a series of newborn symptoms. 1. Diarrhea, abdominal distension: the newborn’s gastrointestinal gas production increases, the number of stools increases, and diarrhea occurs. 2. Changes in stool characteristics: the color of stool becomes yellow-green, and loose or watery stools appear. 3. Other symptoms: may be accompanied by nausea, vomiting and other symptoms, may also appear crying, irritability and other discomfort. Lactose intolerance in newborns can be treated by switching to lactose-free milk powder or adding lactase. When you find that your newborn is lactose intolerant, it is recommended that you can go to the hospital for timely consultation and treatment under the guidance of a professional doctor.