A gastric ulcer is often located in the lower part of the stomach and an ulcer of the esophagus forms in its lower section. No matter where an ulcer sits, it may u. to significant complaints. The symptoms include a burning sensation below the sternum in the upper abdominal area. Other gastric ulcer symptoms are regurgitation or flatulence in some patients. Researchers showed that a majority of patients with gastric ulcers were carriers of H. pylori bacteria.