What is the cause of nausea and vomiting?

People show nausea and vomiting when they are hungry. There are many reasons for this. The common reasons can be summarized as follows: one is to show hypoglycemia. When the body's blood sugar drops, the energy required by the body cannot be supplemented in time, and vomiting and nausea will be shown. The other is gastrointestinal dysfunction, which will be caused by long-term irregular diet. It is recommended to show this situation, go to a regular hospital in time, improve relevant examinations, and carry out targeted treatment after a clear diagnosis.