Hungry belly button pain may be caused by physiological hunger or pathological duodenal ulcer, gastroenteritis. 1. Physiological reasons: may be due to excessive hunger, caused by excessive spasm of the stomach and intestines and caused by epigastric pain, it is recommended that usually standardize the diet, avoid spicy stimulating food. 2. Pathological causes: it may be due to duodenal ulcer, acute gastroenteritis and other digestive diseases causing epigastric pain. The typical performance of duodenum is hunger pain or night pain, relieved after eating; acute gastroenteritis in addition to abdominal pain, diarrhea, fever and other symptoms. If the symptoms of abdominal pain during hunger persist or are severe, it is recommended to consult a doctor in time for gastroscopy and other related examinations to clarify the cause and treatment.