There are many reasons for a large stomach, as follows: 1, the patient is obese, all parts of the body are fat, the stomach can also become larger, known as excessive accumulation of fatty tissue, large omentum or abdominal wall fat is too much, can appear larger stomach; 2, older, more than 50 years old people will also have a larger stomach, because people are prone to gain weight after age, especially the lower abdomen bulge; 3, liver disease or kidney disease caused by the stomach to produce ascites, the appearance of ascites accumulation in the abdominal cavity, can also produce a larger stomach, called ascites. Ascites belongs to the pathological condition, liver or kidney disease, or even heart disease, ascites can not be discharged, and then the stomach becomes larger; 4, tumors are produced inside the stomach, such as gynecological tumors, or even other tumors, such as peritoneal tumors, can also bulge out of the stomach into the abdominal cavity, the body surface can see the stomach becomes larger; 5, some diseases, such as patients with intestinal obstruction, the obstructed intestine or produce internal hernia, or in the local formation The local intestinal canal, because of inflammatory changes, ischemia, etc., can form inflammatory blocks locally, and the stomach can produce uneven enlargement, called asymmetric belly enlargement, which may be the patient’s intestinal obstruction is very serious and needs urgent surgical treatment. The large stomach should be clarified whether it is a physiological or pathological cause, and the pathological cause requires surgical intervention for treatment.