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 was diagnosed almost four years ago and I'd say I'm 90% healed. I maintain my diet and avoid any trigger foods.
Soretum is right about the healing process . It varies so greatly. I got gastritis in August 2012, I would say I was healed 99% Sept / Oct 2013. I still am extremely careful with my diet and my mind still not the "same " as before this sickness. So in all I would say I suffered more or less 12 months with this. I am fine now no more nausea or bloating or pain. Still taking ensure because my diet restricted ( own free will ). Warm wishes and calm thoughts to you.