When lining of stomach is gone what happens?

When the lining of the stomach is compromised or absent, as in conditions like gastritis or peptic ulcers, it can lead to increased vulnerability to stomach acid. This can result in symptoms such as pain, nausea, and indigestion, and may lead to complications like bleeding or perforation. Additionally, the lack of a protective lining can impair digestion and nutrient absorption, potentially leading to deficiencies. Prompt medical attention is typically required to manage these conditions effectively.