Letter B
Blood in stool
Also known as: Rectal bleeding, Bloody stools
Blood in stool symptom guide: what it can mean, possible causes, and when to seek care. Educational only.
Overview
Blood in stool can come from hemorrhoids, anal fissures, stomach ulcers, or other diseases. Colour and amount help clinicians, but do not self-diagnose. Heavy bleeding, dizziness, or severe pain is an emergency.
Possible causes
- Hemorrhoids or anal fissures
- Stomach or duodenal ulcers
- Gut infections
- Polyps or growths
- Medicines that irritate the stomach
When to see a doctor
Get care promptly for visible blood, tar-like black stool, dizziness, or severe abdominal pain.