Helicobacter Pylorii is a bacterium which is associated with Stomach/duodenal ulcers.
It used to be necessary to insert an endoscope into the stomach to test for it, but nowadays there are other much simpler tests such as blowing into a tube or even blood tests.
If you have it, and it is surprisingly common, then it can be eliminated with a couple of weeks of antibiotics.
Your licencing authority may ground you for a few days until they see how you respond to the antibiotics, but it isn't a big thing.
Dont ignore it, it isn't worth ending up with bleeding ulcers, and diverting to some god-forsaken hospital in the middle of nowhere.