Gastritis

• Blood test - Check for anemia by looking at red blood call count. Bleeding from the stomach can be a cause of anemia (low red blood cell count)
  


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  Stool test - Check for presence of blood or the Helicobacter pylori bacteria in the stool.
  


• Upper gastrointestinal endoscopy - Checking the stomach lining for inflammation with an endoscope (thin tube with tiny camera) insterted through mouth or nose. For testing purposes a sample of tissue may be removed, this is called a biopsy.