 [ Symptoms ] what causes black poop i had the stomach flu for 4 days with vomiting and black diarhia i have been better for 2 days however i took pepto bismal for stomach ache yesterday today i had a bowel movement and it was still liquid and black could this be just the infection coming out or is it something more [ Disease ] nothing right now you did not necessarily become exposed to pathogens like salmonella common in undercooked chicken so if you do not show any signs of a gastrointestinal reaction nausea vomiting diarrhea chances are that you just had a poorly cooked meal that will not cause you harm should you become ill however you will need to consult your medical provider so you can be properly examined diagnosed and treated