Gastritis Support Group
Gastritis is a medical term for inflammation of the lining of the stomach. It means that white blood cells move into the wall of the stomach as a response to some type of injury. Gastritis has many underlying causes, from infection with the bacterium H. pylori, bile reflux, or excessive consumption of alcohol or certain foods or drugs like aspirin.

I'm not on those drugs but have had a rash now for over two months. I have no idea why. I'm going to ask my doc on the 14th. Mine is across my upper chest.