I have gastritis. at night my stomach gets upset and i feel nauseous unless i eat something or take antacids. what us this and how can i prevent it?

Heart burn: Is caused by regurgitation of gastric acidic contents up into the lower esophagus GERD. Eat a few hours before going to bed, lay reclined for a few hours after a heavy meal, avoid bending or excercise after meals. Avoid spicy food, liquor , smoking, oily fatty foods, obesity non steroidal anti inflammatory drugs, fish oil capsules ( not the fish, just the oil) Eat low fat fiber rich diet.