What Is Hematochezia?

Hematochezia refers to the passage of bright red blood from the anus, usually mixed with or coating the stool. Unlike dark, tarry stools (called melena), which suggest bleeding higher up in the digestive tract, hematochezia typically indicates bleeding in the lower colon, rectum, or anus. Seeing any amount of fresh blood during a bowel movement can be alarming, but many causes are benign and treatable.

Common Signs of Hematochezia

• Bright red streaks on toilet paper
• Blood mixed in the stool
• Blood pooled in the toilet bowl
• A feeling of urgency or discomfort during bowel movements

While occasional spotting may result from a minor issue like a small tear in the anus, persistent or heavy bleeding warrants prompt evaluation.

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What Causes Bright Red Blood in Stool?

Several conditions can lead to hematochezia. They range from mild irritations to more serious diseases. Understanding the possible causes can help you and your doctor decide on the right tests and treatments.

1. Hemorrhoids

• Swollen blood vessels in the anal canal
• Often cause itching, discomfort, and bright red blood on toilet paper
• Common with constipation, pregnancy, or straining

2. Anal Fissures

• Small tears in the lining of the anus
• Sharp pain during bowel movements
• Blood appears on the surface of the stool or toilet paper

3. Diverticular Bleeding

• Small pouches (diverticula) form in the colon wall
• Diverticulosis is common over age 50
• Bleeding can be sudden and heavy but often stops on its own

4. Colorectal Polyps and Cancer

• Polyps are growths on the inner lining of the colon or rectum
• Some polyps become cancerous over time
• May cause intermittent bleeding, changes in bowel habits, or unexplained weight loss

5. Inflammatory Bowel Disease (IBD)

• Includes ulcerative colitis and Crohn’s disease
• Causes chronic inflammation of the digestive tract
• Symptoms: abdominal pain, diarrhea (sometimes bloody), fatigue

6. Infectious Colitis

• Bacterial, viral, or parasitic infections of the colon
• Often associated with diarrhea, fever, and abdominal cramps
• Common pathogens: E. coli, Salmonella, Shigella, Campylobacter

7. Ischemic Colitis

• Reduced blood flow to part of the colon
• Often affects older adults or those with cardiovascular problems
• Sudden abdominal pain followed by bloody diarrhea

8. Vascular Malformations

• Abnormal blood vessels in the gastrointestinal tract
• Angiodysplasia is a common type in the colon
• Can cause intermittent, painless bleeding

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When to Seek Medical Attention

Bright red blood in the stool isn’t always an emergency, but certain signs mean you should contact a healthcare provider right away:

• Heavy or continuous bleeding
• Dizziness, weakness, or fainting
• Severe abdominal pain
• Fever with bloody diarrhea
• Signs of anemia (pale skin, rapid heartbeat)
• A personal or family history of colorectal cancer

If you’re unsure whether your symptoms are serious, you can do a free, online symptom check, using the doctor approved Ubie Symptom Checker.

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How Is Hematochezia Diagnosed?

Your doctor will start with a detailed medical history and physical exam, including:

1. Digital Rectal Exam
   A gloved, lubricated finger checks for masses and assesses tone.

2. Anoscopy/Proctoscopy
   A short, rigid tube (anoscope) lets the doctor view the anal canal and lower rectum.

3. Flexible Sigmoidoscopy
   A flexible tube examines the rectum and lower part of the colon.

4. Colonoscopy
   Provides a complete view of the entire colon and allows tissue biopsy or polyp removal.

5. Imaging Tests
   CT scan or MRI may be used if bleeding is heavy or the source is unclear.

6. Laboratory Tests
   Blood counts assess for anemia; stool tests check for infections.

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Treatment Options

Treatment depends on the underlying cause of hematochezia:

• Hemorrhoids & Anal Fissures
  • High-fiber diet, stool softeners, sitz baths, topical ointments
• Diverticular Bleeding
  • Often resolves on its own; severe cases may need endoscopic therapy or surgery
• Polyps & Cancer
  • Polyp removal during colonoscopy; surgery, chemotherapy, or radiation for cancer
• Inflammatory Bowel Disease
  • Anti-inflammatory drugs, immune modulators, biologics
• Infectious Colitis
  • Antibiotics or antiparasitic medications, plus hydration
• Ischemic Colitis
  • Supportive care (fluids, bowel rest); surgery if there’s tissue damage

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Preventing Hematochezia

While not all causes are avoidable, you can reduce your risk of bleeding in the lower digestive tract:

• Eat a balanced diet high in fiber (whole grains, fruits, vegetables)
• Drink plenty of water to stay hydrated
• Exercise regularly to promote healthy bowel function
• Avoid straining during bowel movements—respond promptly to the urge
• Limit heavy lifting or activities that increase abdominal pressure
• Get routine colorectal screenings starting at age 45 (or earlier with risk factors)

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Key Takeaways

• Hematochezia is bright red blood in the stool, often from the lower colon or anus.
• Common causes include hemorrhoids, anal fissures, diverticular bleeding, IBD, infections, and polyps.
• Most cases are diagnosed with physical exams and endoscopic procedures.
• Treatment varies by cause but often leads to full recovery.
• Maintaining a high-fiber diet, staying hydrated, and regular screenings can help prevent bleeding.

If you ever notice bright red blood in your stool, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker. Always speak to a doctor about anything that could be life threatening or serious.