Why is stool occult blood positive?

A positive stool occult blood indicates blood in the stool, which may be caused by peptic ulcer, colitis or gastric cancer.

1. Peptic ulcer: Peptic ulcer is a variety of factors leading to digestive tract mucosal damage-self-defense-repair imbalance, so that the digestive tract mucosa reactive inflammation, necrosis, and the formation of ulcers. Because the ulcer will bleed, together with the feces discharged, so it will lead to positive fecal occult blood test results.

2. Colitis: due to pathogen infection, immune abnormalities or other factors caused by inflammation of the colon mucosa, and then cause ulcers, bleeding, will lead to positive fecal occult blood test results.

3. Gastric cancer: The cause of gastric cancer is more complex, is a variety of factors promote gastric mucosa dysplasia, intestinal metaplasia caused by ulcers and bleeding, lesions can lead to positive fecal occult blood test results.