Family member with Ulcer?

I have a family member who has something going on that I would assume is an ulcer. Although he has stomach issues it seems alot of the time it is belching, burping. All that I read seems to fit his symptoms except for the belching that he does. I don't ever read about that. He was on proton pump inhibitors from his doctor and I got him to stop taking them recently. He now takes DGL licorice, cabbage juice, ginger, bananas etc. but nothing seems to be helping. Any feedback would be appreciated.
Peace!