Signs that you have gastritis often start with a burning or gnawing pain in the upper part of your stomach. In the USA, doctors say this pain usually gets worse after eating spicy, greasy, or acidic foods. You might also feel bloated, nauseous, or full even after a few bites. In New York and London, many people ignore early warnings like constant burping, hiccups, or a sour taste in the mouth. If you experience stomach tenderness, vomiting, or black, tar-like stools, your stomach lining may alre