Vomiting, diarrhea and dizziness may be caused by gastrointestinal colds, acute gastroenteritis and other digestive diseases, as well as autonomic disorders. 1. Digestive system diseases: gastrointestinal colds are mainly caused by viral infections and can be accompanied by a series of symptoms such as nausea, vomiting, diarrhea, dizziness and nasal congestion. Acute gastroenteritis can be caused by eating contaminated food and other factors, vomiting, nausea, diarrhea, abdominal pain and other symptoms, dehydration can be severe dizziness, dizziness, lower blood pressure. 2. Autonomic disorders: long-term mental tension, psychological stress and other conditions can cause autonomic disorders, gastrointestinal nerve symptoms, such as nausea, vomiting, diarrhea, and postural hypotension symptoms, such as dizziness, fainting and so on. When vomiting, diarrhea and dizziness occur, it is recommended to go to the hospital and ask the doctor to make a judgment and clarify the cause of the disease.