What Causes Blood In Stool?

Crohn's Disease

Bloody stools can occur due to Crohn's disease. An abnormal immune response and genetic factors are known to play a role in the pathogenesis of Crohn's disease, which falls under a category of diseases called inflammatory bowel disease because it results in digestive tract inflammation. Minor inflammation in the digestive tract is not unusual in healthy individuals, but the inflammation that occurs in those affected by Crohn's disease penetrates deep into the bowel tissue layers. The colon and ileum (last part of the small intestine) are the most prevalent parts of the digestive tract affected by Crohn's disease. Chronic inflammation of the bowel tissues caused by Crohn's disease can result in the formation of ulcers or open sores. Fistulas or ulcers that penetrate through the wall of the intestine may also develop. Anal fissures or tears in the anal mucosa are common in individuals affected by Crohn's disease. An increased risk of intestinal cancer has been proven in Crohn's disease patients. Ulcers, fistulas, anal fissures, and colon cancers that have precipitated from Crohn's disease can all produce bleeding in the gastrointestinal tract that presents as blood in the stool.

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