The symptom of stomach pain when hungry is considered to be caused by stomach diseases, with common causes such as superficial chronic gastritis, gastric ulcer, and gastric sinus cancer. This is because pathological changes in the stomach can cause ulcerative damage to the mucous membrane of the stomach wall and nearby tissues, as well as pressure irritation. Stomach acid secretion is enhanced when the stomach is hungry, and the patient is stimulated by the gastric acid, which causes pain in the stomach. The stomach contents are affected by smooth muscle contraction spasm, so patients with this disease will have secondary symptoms such as nausea, vomiting, acid reflux and heartburn. However, we do not exclude the possibility of pancreatitis, duodenal ulcer, gallbladder stones, etc., because the above organs and tissues are related to the stomach, and once they become diseased, they will also cause stomach discomfort.