I don't have an answer exactly, but I do get bad attacks of gastritis set off by the wrong foods. In particular, too much tomato sauce, paste. I do have to watch what I eat. Sometimes a mix of Benedrayl/Maalox will help - other times it won't touch it. And, I can never get an endoscope scheduled quick enough to see what's happening in there. Ultrasound, etc. doesn't show inflammation or ulcers.