Your line of thinking is interesting. If you actually look at the research, you'll see that stress is still a factor in gastric ulcers (see for example http://w

Your line of thinking is interesting. If you actually look at the research, you'll see that stress is still a factor in gastric ulcers (see for example http://www.ncbi.nlm.nih.gov/pubmed/25111233 http://www.ncbi.nlm.nih.gov/pubmed/25111233 and http://www.ncbi.nlm.nih.gov/pubmed/16581366 http://www.ncbi.nlm.nih.gov/pubmed/16581366). Just because H.Pylori can cause ulcers doesn't mean there can't be other causes. Given that psychological stress increases stomach acid, it's plausible that stress can cause ulcers. A lot of CFS patients bring up the subject of stomach ulcers. It's almost as if they want to prove that psychosomatic illness doesn't exist.