If the stomach has been burning for 1 month, it is not possible to diagnose gastric cancer through this symptom, because the burning sensation in the stomach can be produced by gastritis, gastric ulcer and dyspepsia in clinical practice, especially for 1 month, it may be a manifestation of chronic gastritis, and it is not possible to make a specific diagnosis based on this symptom. In order to diagnose stomach cancer, the most common clinical method besides typical symptoms is gastroscopy, which can thoroughly examine the specific conditions of the stomach, including whether there is ulcer and the possibility of stomach cancer. Therefore, it is better to go to a regular hospital for detailed examination and treatment when heartburn occurs for 1 month.