The elderly can’t eat, consider the following reasons: First, acute and chronic liver injury: If liver function is abnormal, there will be loss of appetite, indigestion, and even nausea, vomiting and other symptoms, to strengthen liver protection, give comprehensive treatment such as glycyrrhiza sweetener preparations, with liver function gradually recovered, appetite will also slowly improve. Second, digestive system diseases: such as acute gastritis, chronic gastritis, gastric tumor, gastric diplegia, cardia loss of flaccidity and many other diseases, will have symptoms such as loss of appetite, inability to eat, abdominal distension, etc. It is recommended to conduct gastroscopy and give appropriate treatment according to different etiologies. Third, constipation and abdominal distension: they also lead to loss of appetite, and it is necessary to strengthen treatment by giving Si Mo Tang Oral Solution, Domperidone Tablets, Lactulose Oral Solution, Gastrointestinal Dissipative Tablets, etc. to promote defecation and strengthen diet. Fourth, electrolyte disorders: such as hyponatremia, hypokalemia, hypophosphatemia, will lead to a decrease in appetite, weakness, and even nausea, vomiting, the above symptoms, if not timely relief, will form a vicious circle, to give a blood test electrolytes for adjustment. Fifth, depressed mood: because of various blows will lead to psychological changes, a decline in appetite, to give comprehensive treatment according to the different causes, so as not to delay the disease.