The patient always wants to vomit but can not vomit, manifesting nausea, this situation needs to see whether the patient has other accompanying symptoms. If accompanied by fever and epigastric pain, it is likely to be acute gastritis, which requires routine blood tests to clarify, and treatment with norfloxacin or levofloxacin, plus omeprazole, is required after diagnosis. If the patient shows nausea and vomiting, no exhaustion or defecation, the possibility of pyloric obstruction should be ruled out, and gastroscopy or upper abdominal plain film should be done to clarify. If the patient is always nauseous and vomiting for a long time, and there is exhaustion and defecation, it may be functional gastric disease or electrolyte disorder, commonly low potassium, low sodium, need to draw blood for ion biochemistry to clarify, after the diagnosis is confirmed through the infusion of fluid supplementation.