Add Yahoo as a preferred source to see more of our stories on Google. zhihao/Getty Images If you see streaks of red on your toilet paper and find you’re pooping blood, you’re almost definitely ... Yahoo: 8 Possible Reasons You’re Pooping Blood—And When to See a Doctor Black poop can be caused by foods or medications.

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Stool may also be black becasue of blood in the digestive tract, known as melena. A small drop of red blood is usually due to minor hemorrhoids but ...