It happens. Firstly, this is a universal property of alcohol. They are cauterized with scratches in the hope of killing the infection there, and in exactly the same way alcohol cauterizes the wall of the stomach and duodenum.
Secondly, ethyl alcohol by itself causes the stomach to secrete more acid, and the duodenum is very sensitive to excess acid. We discussed helicobacters, which cause the stomach to secrete more acid, which flows into the duodenum and burns holes there:
ThirdlyEven without alcohol, some other components in alcoholic beverages stimulate the production of gastrin in the stomach wall, which controls the production of acid. And again we get an ulcer in the duodenum.
Bikes
There are stories among the population that they used to treat stomach ulcers with pure alcohol.
I myself know for sure that a bleeding stomach ulcer through FGS was injected with alcohol to stop bleeding. This is still considered the normal option. But to just swallow alcohol like that ...
In short, I deliberately rummaged through the available sources of medical information, starting in 1920, and did not meet such stupidity. No, brothers. There will be an ulcer from the alcohol. You will not be able to get medical treatment.
I was also amused by one conversation between chemists in some chemical forum. Those in all seriousness discussed that pure ethyl alcohol would instantly cause a chemical burn in the stomach. Like some kind of acid. Naive. Shkolota, I guess. Pure alcohol is normally drunk, guys. It is harmful, but quite tolerable.
Have you tried pure alcohol?