A one-year-old baby with a big bulging stomach may be normal, but it may also be caused by disease factors. 1. normal: one year old baby belly big bulging, consider and baby eat full meal or drink into too much water and so on, because the baby’s abdomen does not have too much muscle, the abdominal wall is thin, the contents of the increase will produce the symptoms of the belly bulging, this is a normal phenomenon, do not need special treatment. 2. abnormal: one year old baby stomach bulging, also does not exclude and disease factors, if accompanied by repeated crying and nausea and vomiting symptoms, consider and intestinal obstruction, megacolon and other factors. A one-year-old baby’s stomach may also have other reasons, based on the symptoms can not be accurately judged, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended that under the guidance of the doctor to clarify the cause, if necessary, active treatment.