Gastritis: Causes, Process and Treatment Gastritis is the inflammation of the stomach lining. It can appear in two main forms: acute and chronic. Acute Gastritis typically develops suddenly due to short-term exposure to aggressive factors like certain medications (e.g., NSAIDs), spoiled food, or excessive alcohol. Chronic Gastritis has a more complex origin. It can be caused by: 🦠A common bacterial infection (Helicobacter pylori) 🚬Long-term use of irritants (like tobacco or alcohol) 💊Prolonge