People go to many extremes to celebrate St. Patrick's Day, but generating green stool shouldn't be one of them. Your morning trip to the bathrooom revealed you may have had one too many green beers ...

Brown poop is normal and comes from a pigment called bilirubin. Green poop can happen from eating foods like spinach or from gastrointestinal infections or severe diarrhea. Black, tarry poop can mean ...