By now, you've probably become pretty well accustomed to how your stool looks. On a good day, it's ideally dark brown, solid, and snakes around the toilet—like a perfect poop emoji. But what if one day, upon inspection, your stool has a green tinge to it? It turns out, green stool is pretty common. In this video, learn the several reasons your poop might take on a greenish hue, including dietary changes or new prescription medications.