Violent vomiting is common in clinical practice, sometimes with rapid onset. It is most often caused by improper diet, such as food poisoning, consumption of undercooked fava beans, kidney beans and pupae. In addition, the consumption of uncleaned or spoiled food can also cause violent vomiting. In the case of female patients, pregnancy vomiting should be excluded. If the patient has severe vomiting, vomiting immediately after eating, accompanied by the symptoms of emaciation, the possibility of esophageal cancer, stomach cancer and other diseases should also be considered. If the patient has a history of previous abdominal surgery and has stopped defecating, the possibility of intestinal obstruction should also be considered. If severe vomiting is accompanied by headache, dizziness and numbness of the limbs, the possibility of acute cerebrovascular disease or viral encephalitis should also be considered. The possibility of endocrine metabolic diseases, such as diabetic ketoacidosis and electrolyte disorders, should also be considered for severe vomiting.