Gas in the stomach may be related to dietary factors, intestinal obstruction, gastrointestinal dysfunction and other reasons. 1. Dietary factors: if you enter a large number of beans and other protein-rich foods, under the action of intestinal bacteria, it can lead to the emergence of a large amount of gas in the intestinal tract, which can be manifested as a bulging stomach. 2. Intestinal obstruction: due to various reasons such as intestinal adhesions, the intestinal contents cannot be discharged normally, and symptoms such as abdominal distension, anal stopping of gas and defecation can occur. 3. Gastrointestinal dysfunction: under the influence of depression, anxiety and other mental factors, gastrointestinal dysfunction can be affected, abdominal distension, abdominal pain and other symptoms. It is recommended that people with a bloated stomach go to the hospital in a timely manner to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.