Loss of appetite, nausea, vomiting, consider the following causes: 1, liver function damage: When liver function damage occurs, there will be a decrease in appetite, indigestion, patients will have nausea, vomiting, diarrhea, abdominal distension and other uncomfortable symptoms, you can give glycyrrhiza sweeteners to strengthen liver protection treatment, with liver function gradually improve, appetite will also slowly recover, clinical appetite can be used as a liver function improvement or deterioration of a key indication. 2, digestive system diseases: such as chronic atrophic gastritis, gastric cancer, gastric diplegia, pancreatic dyscrasia and many other diseases, will also appear discomfort symptoms such as loss of appetite and abdominal distension. Gastroscopy should be performed and appropriate treatment should be given according to different etiologies.3. Constipation and abdominal distension: oral solution of sifang, domperidone and lactulose can be given to promote defecation and enhance diet.4. Electrolyte disorders: such as hypokalemia, hyponatremia, hypochlorhydria, early pregnancy and mood depression can lead to loss of appetite, and comprehensive judgment should be given to avoid delaying the disease.