Stomach pain for 5 years may be caused by stomach cancer, but it may also be caused by chronic gastritis and gastric ulcer. 1. Gastric cancer: If there is stomach pain for 5 years, it does not exclude the possibility of gastric cancer. Most of the gastric cancers do not have obvious symptoms in the early stage, or there will be some non-specific symptoms such as epigastric discomfort, etc. Chronic gastritis: Long-term chronic gastritis leads to congestion, watery gastric mucosa. 2. Chronic gastritis: long-term chronic gastritis leads to congestion and edema of gastric mucosa. After the patient ingests food, due to the friction caused by the food on the mucous membrane of the stomach wall, causing the phenomenon of stomach pain for five years. Chronic gastritis not only pain time is longer, and the pain is not regular. 3. Gastric ulcer: Gastric ulcer may also cause patients to experience long-term stomach pain. Stomach pain caused by gastric ulcers is more intense in nature, and the pain has a certain degree of regularity, mainly occurring half an hour to an hour or so after meals. Patients with long-term stomach pain should go to a regular hospital in time to clarify the cause of the disease and take targeted treatment under the guidance of a professional doctor to avoid delaying the condition.