If there is obvious nausea and vomiting in the stomach, the following conditions should be considered: 1. Consider the cause of gastritis, gastritis will lead to the normal peristaltic function of the gastrointestinal tract is reduced, affecting the digestion and absorption of food, and eventually there will be reflex nausea and vomiting. 2. If you are too tired and do not pay attention to rest, it will also cause gastrointestinal discomfort, nausea and vomiting. 4, if you have seasickness or motion sickness, after going out will cause reflexive symptoms, resulting in nausea and vomiting, need to be dealt with in a timely manner.