Gastritis

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Gastritis

Definition

Gastritis is an inflammation (irritation and swelling) of the lining of the stomach.

Overview, Causes, & Risk Factors

There are many causes of gastritis.

The most common are:

Alcohol
Erosion (loss) of the protective layer of the stomach lining
Infection of the stomach with Helicobacter pylori bacteria
Medications such as aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs)
Smoking

Less common causes are:

Autoimmune disorders (such as pernicious anemia)
Backflow of bile into the stomach (bile reflux)
Eating or drinking caustic or corrosive substances (such as poisons)
Excess gastric acid secretion (such as from stress)
Viral infection, especially in people with a weak immune system

Gastritis can last a short time (acute gastritis) or for months to years (chronic gastritis).

Pictures & Images

Digestive system

Stomach and stomach lining

See all Pictures & Images

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Gastritis : Definition
Gastritis : Overview, Causes, & Risk Factors
Gastritis : Symptoms & Signs
Gastritis : Diagnosis & Tests
Gastritis : Treatment
Gastritis : Prognosis (Expectations)
Gastritis : Complications
Gastritis : Calling Your Health Care Provider
Gastritis : Prevention
Gastritis : References
Gastritis : Pictures & Images
Digestive system
Stomach and stomach lining

Review Date : 1/28/2009
Reviewed By : David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; George F Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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