Normal newborns have a slightly distended abdomen and a soft abdomen on palpation. If abdominal distension occurs, there are the following reasons: 1, violent crying during feeding or artificial feeding with air in the pacifier, swallowing too much air, a lot of gas swallowed into the stomach, you can have gastric distension, the abdomen is relatively bulging, change the feeding method can be; 2, gastrointestinal disorders, such as gastrointestinal disorders appear abdominal distension, vomiting, to find the cause, because of feeding intolerance, or other reasons; 3, digestive tract Developmental abnormalities, such as congenital megacolon, fetal fecal intestinal obstruction, pyloric spasm and obstruction, etc. can also appear abdominal distension. Gastrointestinal type is seen in addition to abdominal distension, and it is necessary to actively consult a regular tertiary care hospital; 4. Other diseases: systemic diseases, such as neonatal sepsis and hypoxic diseases, affect the function of the gastrointestinal tract, and distention of gastrointestinal function and diminished intestinal sounds can also occur, which should be observed and treated under medical supervision.