The most common cause of erosive gastritis—acute and chronic—is prolonged use of nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin and ibuprofen. Other agents that can cause erosive gastritis include alcohol, cocaine, and radiation.
Traumatic injuries, critical illness, severe burns, and major surgery can also cause acute erosive gastritis. This type of gastritis is called stress gastritis.
Less common causes of erosive and nonerosive gastritis include
autoimmune disorders in which the immune system attacks healthy cells in the stomach lining
some digestive diseases and disorders, such as Crohn’s disease and pernicious anemia
viruses, parasites, fungi, and bacteria other than H. pylori