What is the primary feature of Gastritis?

The primary feature of gastritis is the inflammation of the lining of the stomach. This condition can arise from various factors such as infections, irritants like alcohol and medications, or autoimmune responses. The inflammation can lead to symptoms such as stomach pain, nausea, vomiting, and indigestion. Understanding that gastritis specifically involves the stomach lining helps distinguish it from other conditions that may affect different organs or systems in the body, like gallstones, respiratory infections, or gallbladder enlargement. These other choices are unrelated to gastritis, as they pertain to different medical conditions entirely.