Overview of Gastritis - Gastrointestinal Disorders - Merck Manuals
https://www.merckmanuals.com/professional/gastrointestinal-disorders/gastritis-and-peptic-ulcer-disease/overview-of-gastritis
WEBGastritis is inflammation of the gastric mucosa caused by any of several conditions, including infection ( Helicobacter pylori ), drugs (nonsteroidal anti-inflammatory drugs, alcohol), stress, and autoimmune phenomena (atrophic gastritis). Many cases are asymptomatic, but dyspepsia and gastrointestinal bleeding sometimes occur. english
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