Stomach pain sometimes feeling hungry and sometimes abdominal distension may be caused by diseases such as gastric ulcer, duodenal ulcer and gastritis. 1. Gastric ulcer: this kind of people will have stomach pain, abdominal distension, nausea and vomiting, etc. Gastric ulcer has the possibility of cancer, therefore, when going through endoscopy, it is necessary to take tissues for pathological biopsy to determine the benign or malignant nature. 2. Duodenal ulcer: it can be manifested as hunger pain, accompanied by nausea and vomiting, abdominal distension, abdominal pain and other symptoms, and can be treated by taking omeprazole. 3. Gastritis: this group of people can also have abdominal pain, bloating, hunger pains and other phenomena, can be treated by taking omeprazole acid-suppressing drugs. The above drugs need to be applied under the advice of a doctor, and timely consultation is recommended.