Blood in the stool, also known as hematochezia, can be caused by a variety of conditions and diseases. Here are some possible causes of blood in the stool:
Common benign (non-serious) causes:Serious causes:- Ulcers in the rectum
- Injury to the mucosa (lining tissue) in the colorectal system
- Diverticular bleeding
- Inflammatory bowel diseases, such as ulcerative colitis or Crohn's disease
- Colorectal cancer
- Angiodysplasia
- Anal or colorectal polyps
- Infections in the digestive tract
The color of the blood can indicate where in the gastrointestinal system the bleeding is coming from. Black, tarry stool may point to a bleed in the upper gastrointestinal tract, while bright red blood usually means the bleeding is lower in the colon, rectum, or anus. Dark red or maroon blood can mean that the bleeding is higher up in the colon or small intestine. It is important to seek medical attention if you experience rectal bleeding, especially if it is accompanied by severe diarrhea, pencil-sized stools, nausea, vomiting, rectal trauma, irregular heartbeat, fainting spells, or difficulty breathing.
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