My son has had Cholinergic Urticaria for 2.5 yrs. He has also had a chronic and off cough. I also have the same chronic cough.
I had an endoscopy and they took tissue samples. It was positive for this H.Pylori. And guess what? Studies have shown that H.Pylori and chronic urticaria are linked!!!
I had my son tested and positive!! Read this here (scroll down for the skin part): http://www.dermnetnz.org/bacterial/h-pylori.html