Rectal Bleeding With Diarrhea

Rectal bleeding accompanied by diarrhea can be concerning and may indicate inflammation or infection of the gastrointestinal tract. Unlike bleeding caused by hemorrhoids, this combination of symptoms often suggests a condition affecting the colon or rectum.

While some causes are mild and self-limited, others require prompt medical evaluation.

Why Do Bleeding and Diarrhea Occur Together?

When the lining of the colon becomes inflamed or irritated, it may lead to:

• Frequent loose stools (diarrhea)
• Damage to the intestinal lining
• Bleeding from the colon or rectum

This combination is commonly seen in conditions that involve colitis or infection.

Most Common Causes

Gastrointestinal Infections

Infections are a frequent cause of diarrhea with bleeding.

Common features include:

• Sudden onset of diarrhea
• Abdominal cramping
• Fever
• Blood or mucus in stool

These infections may be caused by bacteria, viruses, or parasites.

Inflammatory Bowel Disease

Inflammatory bowel disease (IBD), including ulcerative colitis and Crohn’s disease, is a common cause of chronic diarrhea with rectal bleeding.

Symptoms may include:

• Persistent diarrhea
• Blood in stool
• Abdominal pain
• Urgency to have bowel movements

IBD requires long-term medical management.

Colitis

Colitis refers to inflammation of the colon and may result from:

• Infection
• Reduced blood flow (ischemic colitis)
• Inflammatory conditions

Colitis often presents with:

• Diarrhea
• Rectal bleeding
• Abdominal discomfort

Less Common Causes

Other conditions that may cause rectal bleeding with diarrhea include:

• Diverticular disease
• Colon polyps
• Colorectal cancer

Although less common, these conditions should be considered, particularly if symptoms persist.

Hemorrhoids and Diarrhea

Hemorrhoids can occasionally bleed during episodes of diarrhea due to irritation of the anal canal.

However, hemorrhoids typically do not cause diarrhea, so this combination of symptoms often suggests another underlying condition.

Learn more:
👉 Hemorrhoids

When Is This Serious?

Rectal bleeding with diarrhea may be serious if it is associated with:

• Large amounts of blood
• Persistent or worsening symptoms
• Fever
• Severe abdominal pain
• Dehydration
• Weight loss

These symptoms require prompt medical evaluation.

When to Seek Urgent Care

Seek immediate medical attention if you experience:

• Heavy bleeding
• Signs of dehydration (dry mouth, dizziness)
• High fever
• Severe abdominal pain
• Weakness or fainting

These symptoms may indicate a more severe condition.

How Doctors Evaluate These Symptoms

To determine the cause, doctors may recommend:

• Stool tests to check for infection
• Blood tests
• Colonoscopy or sigmoidoscopy

Colonoscopy is often used if symptoms are persistent or unclear.

Learn more:
👉 Rectal Bleeding Procedures

What You Can Do at Home

For mild symptoms, initial steps may include:

• Staying well hydrated
• Avoiding irritating foods
• Resting the digestive system
• Monitoring symptoms

If symptoms do not improve within a few days, medical evaluation is recommended.

When to See a Doctor

You should see a doctor if:

• Symptoms persist beyond a few days
• Bleeding continues or worsens
• The cause is unclear
• You have additional concerning symptoms

Early evaluation helps identify the cause and guide appropriate treatment.

Learn more about causes:
👉 What Causes Rectal Bleeding

Learn More About Rectal bleeding

You may also explore these guides:

• Rectal bleeding Overview
• Rectal bleeding Symptoms
• Rectal bleeding Procedures
• Rectal bleeding FAQ
• Rectal bleeding Images & Diagrams