Gastritis
Definition
Gastritis is an inflammation (swelling) of the lining of the stomach.
Causes
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 anti-inflammatory drugs)
- 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 occur suddenly (acute gastritis) or gradually (chronic gastritis).
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