Erosive gastritis is an inflammatory disease. It affects the gastric mucosa, causing the erosions appearance of various sizes on it. These erosions do not penetrate deeply into the walls of the stomach and, after healing, do not leave any traces. It is the depth of penetration into the wall of the stomach that distinguishes erosive gastritis from ulcers. The latter disease can affect not only the inner surface, but also deeper tissues and even the muscle layer. Erosive gastritis is dangerous with complications. A quarter of examinations for epigastric burning abdominal pain and nausea ends with this diagnosis.