Hunger, but inability to eat and nausea, is often caused by digestive system diseases, neurological diseases and certain endocrine system diseases. The most common digestive system diseases include acute gastritis and acute esophagitis, when the gastric mucosa is burned and there is acid reflux, heartburn, and excessive secretion of gastric acid. At this time, although the stomach is hungry, it is often unable to eat, accompanied by nausea, vomiting, regurgitation, heartburn, and weakness around the body. When acute gastroenteritis is present, as well as acute peritonitis, cholecystitis, and pancreatitis, there are also cases of inability to eat, nausea, but hunger, which are accompanied by abdominal pain and abdominal distension. Endocrine diseases can also be characterized by hunger but not being able to eat and nausea, often with diseases such as hyperthyroidism and diabetes mellitus. Certain neurological disorders, such as plant nerve dysfunction and damage to central neurons, can also have this symptom.