Take a look at this quick glossary of gastritis-related terms, and see if they help lift that cloud.
Mucosa -- The lining of your stomach is called the mucosa, and it harbors acids and enzymes that are crucial to breaking down food for digestion. Also present is mucus, which protects the stomach lining from acids. If the mucosa becomes inflamed, though, it interferes with the production of acids, enzymes and mucus.
Acute gastritis -- An abnormal inflammation of the stomach lining, or mucosa, is called gastritis. When it produces sudden and severe pain in the upper abdomen, that’s acute gastritis.
Chronic gastritis -- Inflammation of the mucosa that sticks around is called chronic gastritis, and if it is not treated, it can lead to much more serious conditions.
Erosive gastritis -- The inflammation of your stomach lining is not causing much pain, but it is wearing away the mucosa.
https://www.empowher.com/gastritis/content/learn-few-terms-associated-gastritis