Nausea after eating breakfast needs to be alert to the fact that it is caused by gastric ulcer, duodenal ulcer, which can also occur in women when they are pregnant. First of all, patients with gastric ulcer will secrete gastric acid after eating to help digest food. In the process of digesting food, gastric acid will inevitably cause irritation to the ulcerated part of the gastric mucosa, thus inducing contraction and spasm of the stomach wall, and patients will show symptoms such as nausea and vomiting, accompanied by abdominal pain. Secondly, when the ulcerated surface of the duodenal mucosa is attacked by gastric acid, abnormal contractions and spasms may occur, resulting in malignant vomiting. Finally, women should also be alert to pregnancy, women in early pregnancy will be due to hormonal disorders, so the gastrointestinal system will be affected, especially in the morning morning vomiting phenomenon, accompanied by drowsiness, loss of appetite and other performance.