Gastritis is an inflammation of the lining of the stomach. Numerous factors cause this illness, many of which are lifestyle excesses (e.g. excess smoking, excess alcohol, excess caffeine, and excess eating). Gastritis is also a side effect of many medications. Aspirin and nonsteroidal anti-inflammatory drugs are well-known causes. Bacterial and viral infections are also a cause, as is stress from surgery, severe burns, and trauma. These factors tend to produce gastritis by causing an increased acid production in the stomach. One known cause of gastritis that does not involve increased acid production is atrophic gastritis, in which the stomach lining becomes wasted and acid is not produced.
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