A baby’s bulging stomach may be a normal phenomenon, or it may be caused by indigestion, intestinal obstruction and other reasons. 1. Normal phenomenon: if the baby’s body type is relatively obese, or eat too much food, etc. may lead to the baby’s stomach bulging. 2. Indigestion: If the baby has been eating a large amount of food for a long time, or eating hard-to-digest food for a long time, it may cause indigestion, which may lead to the baby’s bulging stomach. 3. Intestinal obstruction: If the baby has adhesions caused by infection in the abdominal cavity, it may cause the baby to develop symptoms of intestinal obstruction, which may lead to the phenomenon of bulging tummy. Therefore, if your baby has a bulging stomach or is accompanied by other uncomfortable symptoms, you should go to the hospital in a timely manner to clarify the cause of the problem and get treatment.