Vomiting and diarrhea can be caused by dietary factors, intestinal infections, and intestinal dysfunction. 1. Food factors: Some behaviors such as consuming cold and spicy food, and drinking a lot of alcohol can cause gastrointestinal tract dysfunction, i.e. vomiting and diarrhea symptoms. 2. Intestinal infections: Bacterial, viral, parasitic and fungal infections can cause damage to the intestinal mucosa, which can lead to a large number of inflammatory cells, causing diarrhea; a large number of toxins invade the blood system, causing vomiting symptoms. 3. Intestinal dysfunction: especially when the intestinal hyperperistalsis, it is easy to cause gastrointestinal food discharge, that is, diarrhea; also cause intestinal reverse peristalsis, inducing vomiting symptoms. Want to pull want to vomit may also be caused by other factors, the patient should go to the regular hospital to receive examination, clear cause and diagnosis, standardized treatment under the guidance of physicians.