Is oatmeal good for gastritis or should i avoid any grains to heal my stomach faster? i hear that grains and oatmeal might make my stomach inflamed.

Misinformed...: Unless you have a contraindication to eating grains and oats, there is no reason to restrict these foods from your diet specifically to "heal stomach faster." What IS appropriate/recommended, if medically possible in your case, is avoidance of NSAID's (aspirin, Advil, (ibuprofen) Aleve), tobacco, and a significant reduction in alcohol. Be well--