The patient should be alert to esophageal cancer, acute gastroenteritis, dyspepsia, pyloric obstruction and other diseases. 1. Esophageal cancer is a malignant tumor, which not only affects physical health, but also causes blockage of the esophagus due to the tumor during the attack. During the attack of acute gastroenteritis, the stomach mucosa is stimulated by inflammation, which causes strong contraction and spasm and squeezes the contents of the stomach, making food intake difficult because of the increased pressure in the stomach. 3. 4. When pyloric obstruction occurs, the emptying of food will be restricted, and the abnormal fermentation of food in the stomach will produce gas, which will also affect the appetite and cause the performance of inability to eat.