: Visible blood in the stool (bright or dark red). Abdominal discomfort : Constant cramping, gas, or bloating. Unexplained fatigue : Often caused by internal blood loss. 2. Prevention and Dépistage (Screening)
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: If a test is positive, a colonoscopy allows doctors to find and remove polyps before they become cancerous. : Visible blood in the stool (bright or dark red)