The difference between stomach pain and stomach cancer is that stomach pain is a clinical symptom, while stomach cancer is a disease, and stomach cancer will cause the symptom of stomach pain. Including other benign diseases of stomach, stomach pain symptoms will also occur, such as acute gastritis, chronic gastritis, gastroesophageal reflux disease, gastric ulcer, duodenal ulcer, etc. While for the above diseases are benign diseases, stomach pain symptoms will appear, if stomach pain is caused by gastric cancer, it is a malignant tumor and the prognosis of gastric cancer is poor. Early detection, early diagnosis and early treatment may be able to cure stomach cancer through surgical treatment. Patients who have unexplained stomach pain or stomach pain with unsatisfactory effect of treatment with acid-suppressing drugs need to go to hospital in time.