The most common causes of stomach discomfort after pregnancy are as follows: 1. Pregnant women have stomach problems themselves, but they have stomach problems during pregnancy, and the symptoms of stomach discomfort appear. 2. Due to the fact that eating during pregnancy is different from before, and the amount of food eaten is larger, which causes functional symptoms in the stomach. 3. The gradual increase of the fetus will cause the stomach to be compressed and the capacity of the stomach will be reduced, which will also cause stomach discomfort, especially after eating.