Right abdominal distension after lunch is considered to be caused by gastric ulcer, cholecystitis, cirrhosis, intestinal spasm and other diseases. 1. Gastric ulcer: the role of Helicobacter pylori infection, bacteria, viruses, aspirin and other non-steroidal anti-inflammatory drugs, resulting in gastric mucosa congestion, edema and ulceration. Typical performance is pain after meals, need to use acid inhibitors with gastrointestinal mucosal protection agent treatment. 2. Cholecystitis: refers to the biliary tract obstruction caused by gallbladder stones and other bile stasis on the basis of triggering infection, which leads to acute and chronic inflammatory reactions in the gallbladder. It can be manifested as sudden onset of severe colic pain in the right upper abdomen, radiating to the right shoulder and back, often occurring after eating a lot of fat or at night. It may be accompanied by chills, high fever, jaundice, nausea, vomiting and other symptoms. 3. Cirrhosis: It refers to the pathological process in which the normal structure and blood supply of the liver are destroyed and the fibrous tissue of the liver proliferates extensively, forming nodules, fibrous septa and pseudo lobules, which may cause pain in the liver area, enlarged or shrunken liver, enlarged spleen, ascites, jaundice, liver palms, spider nevus and other symptoms. People who have previous disease of hepatitis need to be alert. 4. Intestinal spasm: Binge drinking, eating too much cold and stimulating food, cold abdomen can cause intestinal spasm, which is typically manifested as abdominal pain, which can be manifested as colic or bloating pain. When the intestinal spasm is severe, it can be treated with antispasmodic and analgesic therapy such as pivacurium bromide. Right abdominal distension after lunch is recommended to consult a doctor to clarify the diagnosis, under the guidance of the doctor for targeted treatment.