Occult blood in stool is impossible to see with the naked eye and requires a fecal occult test that detects hidden blood in feces sample, according to WebMD. Sometimes people can see blood in their stool, however. More » Health Conditions & Diseases

Bright red blood in the stool can be an indication of several conditions, including an anal fissure, polyps, diverticula, Crohn's disease, hemorrhoids, ulcerative colitis, angiodysplasia and cancer, among other condition... More » Health Pain & Symptoms

Hemorrhoids, anal fissures, diverticulosis and colon polyps are the most common causes of blood in the stool, as confirmed by MedicineNet. Blood in the stool ranges in color from bright red to black. More » Health Pain & Symptoms
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