Stomach Ulcer Unveiled: Controversial 5 Effective Ways to Treat It - Myth or Reality? A stomach ulcer, also known as a gastric ulcer, is a painful sore that forms on the lining of the stomach. It is a type of peptic ulcer, which refers to ulcers that occur in the stomach or the upper part of the small intestine, called the duodenum. Stomach ulcers are a common medical condition that can cause discomfort and various symptoms. In this article, we will explore the causes, symptoms, and effective ways to treat stomach ulcers. Causes of Stomach Ulcers Stomach ulcers are primarily caused by an imbalance between stomach acid and the protective lining of the stomach. The most common cause is the infection of the stomach lining with a bacterium called Helicobacter pylori (H. pylori). This bacterium weakens the protective mucus layer of the stomach, allowing acid to damage the underlying tissues. Other factors that can contribute to the development of stomach ulcers include: Regular use of nonst