Flatulence in the right upper abdomen may be caused by gastric diseases, such as gastric ulcer, gallbladder disease, liver disease, intestinal obstruction and other causes. 1. Gastric diseases: for example, gastric ulcer, duodenal ulcer may involve upper right abdominal distension during acute attacks. 2. Gallbladder diseases: for example, cholecystitis, gallstones, choledocholithiasis can easily cause obstruction of the gallbladder cavity and poor bile discharge, which affects the digestion of food and leads to right upper abdominal distension. 3. Liver diseases: such as hepatitis, cirrhosis, liver fibrosis and other liver cell injuries can also occur in the upper right abdominal distension, bloating and pain and other discomforts. 4. Intestinal obstruction: such as intestinal tumors, intestinal adhesions, intestinal torsion and other causes of intestinal contents can not be discharged, can also lead to the right upper abdominal distension, may be accompanied by vomiting, abdominal pain and other symptoms. It is recommended to consult a doctor to find out the cause and give targeted treatment.