The pain in the stomach and nausea may be caused by the following diseases: 1. intestinal obstruction manifested as abdominal pain, abdominal distension, nausea, even vomiting and anal cessation of exhaustion and defecation. 2. cholecystitis manifested as pain in the right upper abdomen or subxiphoid process, often accompanied by abdominal distension and nausea. Constipation is manifested as pain around the umbilicus, often accompanied by nausea due to obstruction of defecation. 5. If appendicitis occurs, the patient will show pain in the right lower abdomen, often accompanied by nausea, and even fever. It is recommended that patients with stomach pain and nausea must seek medical attention and improve the tests to clarify the cause and then treat accordingly.