There are several causes that can cause diarrhea and vomiting: 1, diarrhea is mainly caused by infectious diseases of the intestinal tract, such as viruses, bacteria, parasites and other infections, mostly accompanied by abdominal pain and fever symptoms; 2, vomiting is mainly due to the reflex strong contraction of the stomach, such as pyloric obstruction is generally jet vomiting, vomit for overnight lodging and intestinal obstruction vomit, usually containing bile, it is necessary to pay attention to Pay attention to the vomit, the presence or absence of blood and the amount of blood contained, to identify the presence of upper gastrointestinal bleeding. 3, diarrhea with vomiting can exclude intestinal obstruction, pyloric obstruction and other obstructive diseases, most patients with diarrhea, vomiting are accompanied by abdominal pain, fever and other symptoms, is caused by inflammatory diseases of the intestine, diarrhea should observe the shape of the stool, whether there is blood in the stool and the number of stools per day. Diarrhea with vomiting can lead to a series of electrolyte disorders such as dehydration if it lasts for a long time. If intestinal inflammation is not treated in time, prolonged infection can cause infectious shock, and violent vomiting can cause bleeding due to tearing of the cardia mucosa.