In a new Health survey, a third of adults in the U.S. said they had poop abnormalities in the last month. Here's what they're ...

Fact checked by Nick Blackmer Medically reviewed by Qin Rao, MD Rectal bleeding, which may present as hematochezia, may be a "red-flag" symptom of early-onset colorectal cancer, especially in young ...

Constipation can lead to blood in stool for some people. Anal fissures, hemorrhoids, or other medical conditions are some of the reasons behind this. Learn more.

If blood in the stool is accompanied by symptoms such as dizziness, fainting, severe abdominal pain or unexplained weight loss, it could be a sign of a more serious underlying condition.

Bright red blood in your stool might be more alarming because it suggests active bleeding. Darker blood usually suggests older bleeding that’s not active anymore.

Hematochezia presents as bright red blood that usually comes from the lower gastrointestinal tract. Melena involves black, tarry stools that often come from the upper gastrointestinal tract.

You may see some blood in your stool when you are having a flare-up of your UC. But too much is a warning sign. Learn treatment options, and when to call your doctor.