In the case of stomach ulcers it actually is more complicated. Helicobacter pylori is the most common cause, but not the only cause: http://www.uptodate.com/co

In the case of stomach ulcers it actually is more complicated. Helicobacter pylori is the most common cause, but not the only cause: http://www.uptodate.com/contents/association-between-helicobacter-pylori-infection-and-duodenal-ulcer http://www.uptodate.com/contents/association-between-helicob...