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What It Means
What Bloody Stool Means
Bloody stool means that blood has entered a bowel movement. It may appear as visible bright red blood, dark red or maroon stool, or black, tarry stool. The appearance can offer clues about where bleeding started, but it cannot confirm the cause by itself.
What the color and texture may suggest
Bright red blood on toilet paper or coating the outside of the stool may come from the anus, rectum, or lower colon. Blood mixed through the stool may have traveled farther through the colon, while bloody mucus can occur with irritation, infection, or intestinal inflammation. Black, sticky, tarry stool can indicate bleeding higher in the digestive tract, although foods, supplements, or medicines can sometimes change stool color. Bleeding may occur anywhere from the anus or rectum to the colon or upper digestive tract, and painless bleeding still needs appropriate assessment.
Emergency Warning Signs
Emergency Warning Signs
Get urgent help
Bloody stool can sometimes be an emergency
Seek emergency medical care for heavy or persistent bleeding, black tarry or maroon stool, fainting, severe weakness, confusion, a rapid heartbeat, severe abdominal pain, vomiting blood, or bloody diarrhea with a high fever or signs of dehydration.
- Do not drive yourself if you feel faint, confused, or severely weak.
- Tell clinicians about blood-thinning medicines and the amount and appearance of the bleeding.
Possible Causes
Possible Causes of Bloody Stool
| Possible cause | Clues that may occur | Why assessment matters |
|---|---|---|
| Hemorrhoids | Bright red blood on toilet paper or coating stool; itching or swelling may occur | Often benign, but persistent or unexplained bleeding still needs review |
| Anal fissure | Bright red blood with sharp pain during or after a bowel movement | Treatment can reduce pain and prevent recurrence |
| Infection | Bloody diarrhea, cramps, fever, or urgency | May require prompt assessment and testing |
| Inflammatory bowel disease | Repeated bloody diarrhea, mucus, abdominal pain, or weight loss | Needs medical diagnosis and ongoing treatment |
| Diverticular bleeding | Sudden painless bright red or maroon bleeding | Can be heavy and may require urgent care |
| Polyps or colorectal cancer | Intermittent blood, altered bowel habits, anemia, or weight loss | Requires evaluation to identify and treat the source |
| Upper digestive tract bleeding | Black, tarry, or very dark stool; weakness or dizziness may occur | Can be an emergency |
Medicines such as anticoagulants, antiplatelet drugs, and some anti-inflammatory medicines can increase bleeding risk or make bleeding heavier. Do not stop a prescribed medicine, including a blood thinner, without medical guidance.
Bloody mucus and diarrhea
Bloody diarrhea, bloody mucus feces, or what may look like slimy bloody poop is more suggestive of infection or intestinal inflammation than simple surface irritation, particularly when accompanied by cramps, fever, urgency, or repeated episodes. A clinician may ask about the timing, amount, color, bowel habits, travel, foods, and medicines, then perform an examination and order blood or stool tests. Endoscopy or imaging may sometimes be needed to locate the source.
Relief Tips
What to Do Until You Get Medical Advice
Record the color and approximate amount of blood, how often it occurs, and any pain, fever, diarrhea, mucus, dizziness, or bowel changes. Note recent foods, travel, and all medicines, and maintain fluids unless a clinician has advised you to restrict them. These details can help explain the blood in stool and should not delay medical assessment.
When to See a Doctor
When to See a Doctor
Contact a clinician about any unexplained bloody stool, even if the bleeding is painless or happens only once. Arrange prompt medical advice if it recurs, lasts more than a short period, or occurs in an adult who is due for colorectal screening. Painless bright red blood in stool can have a minor cause, but its source should not be assumed without assessment.
- Blood in stool that recurs or does not settle.
- Bloody diarrhea, mucus, fever, or significant abdominal pain.
- Unexplained weight loss, fatigue, or a persistent change in bowel habits.
- A personal or family history of bowel disease, polyps, or colorectal cancer.
- Use of anticoagulant or antiplatelet medicines.
Complications
Possible Complications
Repeated or substantial blood loss can lead to iron-deficiency anemia, causing tiredness, shortness of breath, dizziness, or fainting. Rapid blood loss can affect circulation and may become life-threatening.
Other complications depend on the underlying cause of the blood in stool. Persistent, recurrent, or unexplained bleeding should be medically assessed rather than managed only at home.
Diseases & Conditions
3 topics
Bloody Stool
Hemophilia
Bloody Stool
Intussusception
Bloody Stool
Ulcer
