A large baby belly may be physiological factors, which is normal. It may also be due to indigestion, rickets and other disease factors, which are not normal phenomena. Because the infant abdominal muscle development is not yet perfect, the abdominal wall is relatively flaccid, after eating a full stomach will be affected by the gastrointestinal contents and deformation, appearing baby belly, is a normal phenomenon. Infant indigestion can also cause slow peristalsis of the gastrointestinal tract, resulting in food and other fermentation in the gastrointestinal tract, resulting in increased gastrointestinal tract gas caused by a distended stomach. In addition, rickets can cause rib flaring, abdominal wall muscle relaxation, resulting in abdominal organs protruding obviously, will also appear in the phenomenon of the baby’s stomach. It is recommended that parents should observe the baby’s feeding, sleeping, urination and defecation, mental state, growth and development, etc., if there is any abnormality need to go to the hospital in a timely manner to avoid aggravation of the condition affecting the healthy growth of infants.