Stomach pain is caused by the hydrochloric acid that burns the unprotected parts of your stomach. Fact: stomach acid is just as strong as battery acid. So the damage it can cause is very serious.
Normally, the stomach is protected by a coating layer from the hydrochloric acid. That layer can replace itself if damaged within hours. But if your body is under stress it’s job is more difficult.
Add to that all the chemicals, preservatives and processed foods you’re eating and you have a situation when the stomach is having a tough time digesting the food and is working overtime producing acid. In the same time, the stress you’re putting on your body slows down the process replacing the protective layer of your stomach.
So you end up having multiple times the normal amount of acid in your stomach and little to none protective layer against it.
Ending stomach pain after eating calls for dietary and lifestyle changes. Going for prescription drugs is not recommended because of the side effects they have and because they don’t treat the real problem, only mask it for a short while.