Lying flat after a meal can induce gastritis, and this etiology usually results in bile reflux gastritis.
After a meal, food enters the stomach, stimulating increased gastric peristalsis and gallbladder contraction, causing increased secretion of gastric acid and bile. At this time, if you are lying down, lose the effect of gravity, food will be easy to reflux upward, causing gastrointestinal peristaltic dysfunction, which will further lead to bile reflux into the stomach.
Bile is alkaline, if refluxed into the stomach, it will neutralize the gastric acid and damage the gastric mucosa. With the change of time, the condition gradually evolves into bile reflux gastritis. Therefore, lying down after meals can lead to bile reflux gastritis. Instead of lying down immediately after meals, you can sit down and rest for a while, wait for a certain amount of time for the food to be digested, and then lie down or move around again.
It is recommended to develop good habits after meals. If you feel unwell, you should consult a doctor in time and use medication under his guidance.