In general, stomach pain stomach pain can be considered as gastritis, gastric ulcer, gastric cancer and other diseases, may also be overeating and other causes. 1. Gastritis: refers to the inflammation that occurs in the stomach, which is related to trauma, burn, sepsis, anti-tumor drugs such as cisplatin, non-steroidal anti-inflammatory drugs such as celecoxib, alcohol, Helicobacter pylori infection, etc. It is mainly manifested as nausea, vomiting, acid reflux, gastric distension, stomach pain, and so on. 2. Gastric ulcer: refers to ulcers occurring in the stomach, related to Helicobacter pylori infection, excessive secretion of gastric acid, etc., which can be manifested as acid reflux, heartburn and stomach pain. When perforation of ulcer occurs, it can be manifested as severe pain in the upper abdomen. 3. Gastric cancer: malignant tumor occurring in stomach, related to Helicobacter pylori infection and gastric ulcer, etc. It may have stomach pain, acid reflux, loss of appetite, etc. It may be accompanied by upper gastrointestinal bleeding, such as vomiting blood, blood in stool, etc. In the late stage, it may have anemia, emaciation and other symptoms. Stomach pain and stomach pain may also be caused by overeating, etc. It is recommended that patients seek medical attention to clarify the diagnosis, and targeted treatment under the guidance of the doctor.