Causes of gastritis

• drinking too much alcohol


• prolonged use of nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin or ibuprofen


• infection with bacteria such as Helicobacter pylori (H. pylori)


• major surgery


• traumatic injury


• traumatic burns


• severe infections


Diseases that can cause gastritis:



• pernicious anemia
• 
  
• autoimmune disorders


• chronic bile reflux