What is a gastric ulcer?

A gastric ulcer is specifically defined as a peptic ulcer that develops in the stomach lining. It occurs when the protective mucus layer in the stomach is compromised, allowing stomach acid to damage the tissue. This can lead to various symptoms, including pain, vomiting, and indigestion.

The term "peptic ulcer" encompasses both gastric ulcers, which occur in the stomach, and duodenal ulcers, which occur in the first part of the small intestine. Therefore, the focus on the stomach lining is crucial in understanding what constitutes a gastric ulcer.

In contrast, ulcers located in the esophagus or small intestine are classified differently and have distinct characteristics and causes. Similarly, an ulcer that occurs in the colon would not fall under the category of a gastric ulcer, as it refers to a different part of the gastrointestinal tract entirely. Understanding the specific location and type of ulcer is essential for appropriate diagnosis and treatment.