Nausea after eating can be caused by pregnancy, functional dyspepsia, gastritis, pyloric obstruction and other reasons. 1. Pregnancy: The increase of hormones in the body of women after pregnancy leads to a decrease in gastric acid secretion and weakened digestive ability, which can lead to nausea after eating. 2. Functional dyspepsia: because the food in the stomach is not emptied in time, the pressure on the stomach increases after eating, resulting in bloating and nausea. 3. Gastritis: damage to the gastric mucosa, inflammation, erosion, usually manifested as nausea, fullness, acid reflux, heartburn and other symptoms after meals. 4. Pyloric obstruction: food cannot be discharged through the pylorus, and the increased pressure on the stomach after eating triggers nausea, vomiting, stomach pain and other symptoms. 5. Pancreatitis: It usually strikes after eating greasy food and after meals and manifests itself as nausea, pain in the upper left abdomen and other symptoms. There are many reasons for nausea after eating, and it is recommended that you seek medical attention to identify the cause of the problem and follow the doctor’s instructions.