1 year 7 months baby belly big may be abdominal wall tissue relaxation, gastrointestinal dysfunction, intestinal obstruction and other causes. 1. Loose abdominal wall tissue: 1 year 7 months baby’s abdominal wall tissue is loose, abdominal muscles can not withstand the weight of the organs and abdominal expansion, after eating the stomach will be deformed, the stomach looks bigger, eat more, the stomach looks bigger will be more obvious. 2. Gastrointestinal dysfunction: 1 year 7 months baby has gastrointestinal dysfunction, such as dyspepsia, constipation, more gas in the abdominal cavity, bloating phenomenon, the appearance of the stomach looks bigger. 3. Intestinal obstruction: 1 year 7 months baby has intestinal obstruction, intestinal contents can not be successfully discharged from the body, intestinal lumen due to a large accumulation of feces appear in the lower abdomen, there will also be the phenomenon of the tummy becomes large. There may also be other reasons for a 1 year 7 month old baby’s large stomach, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.