Why is there blood in my stool? What does it mean?

If you find blood in your stool, or if your stool looks red, it is important not to ignore it, as it may be a sign of a serious condition. If you can’t find a dietary reason for the color change (see below), talk with your doctor as soon as you can.

Take note of:

• How much blood there is. Try and estimate the quantity, for example, one teaspoonful or is it more a constant drip. Do you have to wear protection in your underwear (such as incontinence pads) to stop it getting on your clothes?
• What color is it? This can help identify the cause. For example, bright red or maroon blood is usually a sign of hemorrhoids or an anal fissure (a small tear in your anus). Dark, tarry, blood may indicate bleeding in the upper digestive tract.
• When do you notice it? Is it just on the toilet paper when you wipe after a bowel motion, is it mixed in with the stool, or is it just sitting on top?
• Do you have any other symptoms, such as bleeding or bruising elsewhere, constipation, fatigue, pain, or weight loss?

Red Stool Causes

Conditions that can make the stools look red or bloody include:

• Anal fissures
• Bleeding in the lower part of the digestive system
• Cancer
• Crohn’s disease
• Diverticulosis
• Hemorrhoids
• Ulcerative colitis.

Related questions

• Can hemorrhoids cause urinary problems?
• Which drugs cause opioid-induced constipation?
• Can you put hydrocortisone cream on hemorrhoids?

Black Stool Causes

Conditions that cause the stools to look black (which may signal old blood or bleeding higher up in the digestive system) include:

• Bleeding within the GI tract (eg, from stomach ulcers)
• Bowel ischemia (a reduction of blood flow to the intestines)
• Cancer
• Varices
• Vascular malformations (misshapen veins in the intestines).

Dietary Reasons For Red Stools

Some foods or medicines may also make your stools look red. Examples include:

• Beets
• Cranberries
• Tomato juice/soup
• Red drink mixes
• Red gelatin
• Red food coloring
• Sun-dried tomatoes
• Worming medications.

Some foods or medicines may also make your stools look black. Examples include:

• Bismuth subsalicylate (Kaopectate, Pepto-Bismol)
• Blueberries
• Dark chocolate
• Iron supplements
• Licorice.

Read next

See also:

Related medical questions

• My stool has changed color. What does it mean?
• How do you to treat hemorrhoids at home?
• What foods should I avoid when taking omeprazole?
• Nexium vs Prilosec: What's the difference between them?
• What is Quercetin and what are its health benefits?
• Over the Counter Medication for Pets
• How Can I Treat Muscle Strain or Pain?
• The Do's and Don'ts of Treating Heartburn
• What are the benefits and risks of daily aspirin?
• Can you use Topical Medications to Treat Arthritis Pain?
• How do I use NSAIDs Safely?
• What is Trimebutine used for?
• If I am Lactose Intolerant or Lactose Allergic, are there Medications I should Avoid?
• Fish Oil and your Health
• What OTC drugs relieve tripledemic symptoms in kids?
• Norovirus: What to know
• Should I be Concerned about a Mpox Outbreak?
• How long does it take for Keytruda to work?
• What is Herceptin? Is Herceptin a chemo drug? How does it work?
• Pembrolizumab vs. nivolumab: How do they compare?
• How long does Herceptin stay in your body?
• What happens after Herceptin treatment?
• What are the biosimilars of Herceptin?
• Opdivo vs Opdivo Qvantig: What is the Difference?
• How effective is Herceptin for Breast & Gastric Cancer?
• What is the difference between Herceptin and Herceptin Hylecta?
• What is the difference between Ogivri and Herceptin?
• How is Herceptin Injection and Herceptin Hylecta administered?

Related support groups

• Hemorrhoids (26 questions, 98 members)
• Gastric Ulcer (23 questions, 48 members)
• Gastrointestinal Disorders (18 questions, 79 members)
• Gastric Cancer (12 questions, 12 members)
• Anal Fissure and Fistula (10 questions, 44 members)

Medical Disclaimer