It is necessary to first determine whether it is the presence of a mass on the abdominal wall that causes the two sides of the abdomen not to be the same height. If there is a mass on the left side of the patient’s abdomen, you can use your hand to carefully examine it, and generally be able to find out the location, size, and hardness of the mass, and then come to the hospital for examination if necessary. At the same time, if the patient has a mass in the abdominal cavity, it can also lead to the left side of the stomach is higher than the right side of the stomach, such as small intestine tumor, sigmoid colon tumor, descending colon tumor can appear, the patient may have hidden pain, pain in the abdomen, as well as the appearance of increased frequency of bowel movements, stools become dilute, black stools and other manifestations, if necessary, you can perform abdominal CT or enteroscopy for further clarification. If the diagnosis of intra-abdominal mass, usually need to perform surgical resection. If the patient has a tumor of the descending colon or sigmoid colon, radical treatment of the tumor is required.