12 Causes of Bloody Stool

When it comes to our health, certain symptoms can be quite alarming and often demand immediate attention. One such symptom that can leave anyone concerned is finding blood in their stool. Bloody stool, medically known as hematochezia, can be caused by a variety of factors, ranging from minor issues to potentially serious underlying conditions. In this article, we will explore the 12 common causes of bloody stool and what they might indicate about your health.

Understanding Bloody Stool

Bloody stool occurs when there’s blood visibly present in your bowel movements. The color of the blood can range from bright red to maroon or even black, which indicates bleeding higher up in the digestive tract. Here are 12 potential causes:

Anal Fissures

Anal fissures are small tears in the lining of the anus, often caused by passing hard stools. These tears can result in minor bleeding during bowel movements.


Hemorrhoids are swollen blood vessels in the rectum or anus. They can cause bleeding, especially when straining during bowel movements.

Gastrointestinal Infections

Certain bacterial or viral infections in the gastrointestinal tract, like gastroenteritis, can lead to inflammation and bleeding in the digestive system.

Peptic Ulcers

Peptic ulcers are sores that develop on the inner lining of the stomach or the upper part of the small intestine. They can cause bleeding, resulting in bloody stool.

Inflammatory Bowel Disease (IBD)

Conditions like Crohn’s disease and ulcerative colitis are forms of IBD that can cause chronic inflammation and bleeding in the digestive tract.


Diverticulitis occurs when small pouches in the colon become inflamed or infected. This can lead to bleeding, among other symptoms.

Colon Polyps

Polyps are small growths that can develop in the colon. While most are benign, some can bleed and even turn cancerous over time.

Colorectal Cancer

Colorectal cancer can cause bleeding in the lower digestive tract. Bloody stool could be a symptom, especially in advanced stages.

Anal Cancer

Cancer of the anus can also lead to bleeding during bowel movements. Early detection is crucial for effective treatment.

Intestinal Ischemia

This condition occurs when blood flow to the intestines is restricted, causing damage to the tissue and potential bleeding.


Certain medications, like blood thinners and anti-inflammatory drugs, can increase the risk of bleeding in the digestive tract.

Foodborne Illnesses

Consuming contaminated food can result in infections that lead to gastrointestinal bleeding and subsequently, bloody stool.


If you ever notice blood in your stool, it’s essential not to panic but to take it seriously. While some causes of bloody stool might be relatively benign, others could signify severe underlying health issues. Always consult a medical professional for an accurate diagnosis and appropriate treatment.

FAQs (Frequently Asked Questions)

  1. Is bloody stool always a sign of cancer? No, while colorectal cancer can cause bloody stool, there are many other potential causes.
  2. Should I seek medical attention for minor instances of bloody stool? It’s recommended to consult a doctor regardless of the severity to rule out any serious conditions.
  3. Can spicy foods cause bloody stool? Spicy foods are unlikely to cause bloody stool; it’s more commonly related to other factors.
  4. What tests might a doctor perform to diagnose the cause of bloody stool? Doctors might perform tests such as colonoscopy, stool analysis, and blood tests to determine the cause.
  5. How can I prevent bloody stool? Maintaining a high-fiber diet, staying hydrated, and avoiding excessive straining during bowel movements can help prevent some cases of bloody stool.
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