The main causes of vomiting, diarrhea and dizziness include the following: 1. Food poisoning caused by poor dietary conditions, usually do not pay attention to dietary hygiene, resulting in a large intake of moldy, spoiled or even contaminated food, viruses or bacteria enter the body through the gastric mucosa, causing the phenomenon of food poisoning. 2. Acute gastroenteritis, acute gastroenteritis can lead to abdominal pain, diarrhea and The phenomenon occurs.