Gastroparesis may be caused by gastritis, gastric ulcer or duodenal ulcer. 1. Gastritis: usually manifested as pain in the upper and middle abdomen, abdominal distension, belching, nausea, loss of appetite, etc., but the symptoms of stomach pain can also occur alone. 2. Gastric ulcer: the typical symptom is burning pain in the stomach, which may be accompanied by bloating, belching, feeling of fullness, vomiting or vomiting of blood, and accompanied by a change in the color of the stool. Gastric ulcer is usually manifested as epigastric pain after meals, which can be alleviated after 3 to 4 hours and may recur. 3. Duodenal ulcer: manifested as epigastric pain during fasting, mostly occurring 3 to 4 hours before or after meals, and can be cyclic and rhythmic. It is recommended to go to the local hospital for gastroscopy and carbon 14 breath test and other tests to further clarify the diagnosis and treatment under the guidance of the doctor.