Hello! Nausea after a meal is not a simple reason, and it must not be underestimated. I suggest you go to the hospital for a more detailed examination as soon as possible. In addition, as far as your situation is concerned, it seems to be a digestive system disease, probably caused by gastritis and insufficient gastric motility. I suggest you go to the digestive department of a regular hospital, and you'd better have a gastroscope to thoroughly find out what the problem is. This situation is urgent and should be treated as soon as possible.
Now we should pay great attention to diet, avoid cold, spicy, hard and irritating foods, have a balanced diet, mix vegetarian and vegetarian foods, and it is best to eat more warm foods. Drinking hot porridge every meal is also very nourishing for the stomach. Eat regularly and never get hungry. When you are hungry, you are most afraid of being hungry. Excessive gastric acid secretion when you are hungry will stimulate the gastric mucosa and cause gastritis. If you are 80% full, you will burp and cannot digest it.