Black stool? Bright red blood? Each tells a different story. I've explained what these signs indicate and when to seek help. Watch the video, and if you relate to any of these Natural or Biologic Chromoendoscopy for Detection of Colorectal Polyps EndoCollab Foods That Cause Dark Stools and When to Be Concerned GoodRx Black or Tarry Stools UF Health Stool Colors What Poop Colors Mean & When to Worry Buoy