Dr Keyur Bhatt

Blood in Stool: When Should You Be Concerned?

 

Finding blood in your stool can be alarming. While not every case indicates a serious disease, blood in the stool should never be ignored. It can be caused by something as simple as hemorrhoids (piles) or as serious as colorectal cancer. Early evaluation can help diagnose the underlying cause before complications develop.

 

What Does Blood in Stool Look Like?

Blood in the stool may appear differently depending on where the bleeding occurs.

1. Bright Red Blood

Usually indicates bleeding from the lower digestive tract, such as:

  • Piles (Hemorrhoids)

  • Anal fissure

  • Rectal polyps

  • Rectal cancer

  • Lower colon bleeding

You may notice blood:

  • On toilet paper

  • In the toilet bowl

  • Coating the stool

2. Dark Maroon Blood

Often suggests bleeding from:

  • Large intestine

  • Small intestine

This usually requires medical evaluation.

3. Black, Sticky Stool (Melena)

Black, tar-like stool often indicates bleeding from:

  • Stomach ulcer

  • Gastritis

  • Esophagus

  • Upper intestine

This is considered a medical emergency.

Common Causes of Blood in Stool

1. Hemorrhoids (Piles)

The most common cause.

Symptoms include:

  • Bright red bleeding after passing stool

  • Pain (sometimes)

  • Swelling around the anus

  • Itching

Fortunately, most cases can be treated without major surgery.

2. Anal Fissure

A small tear in the anal canal caused by constipation or passing hard stool.

Symptoms:

  • Severe pain during bowel movements

  • Bright red blood

  • Burning sensation

3. Constipation

Repeated straining may cause minor bleeding from:

  • Small tears

  • Inflamed hemorrhoids

Increasing water and fiber intake usually helps.

4. Colon Polyps

Polyps are abnormal growths inside the colon.

Many patients have:

  • No symptoms

  • Occasional bleeding

Some polyps may gradually develop into colon cancer if left untreated.

5. Colorectal Cancer

One of the most important causes that should never be missed.

Symptoms include:

  • Blood in stool

  • Change in bowel habits

  • Weight loss

  • Fatigue

  • Anemia

  • Persistent abdominal pain

Early-stage colorectal cancer is highly treatable, especially when diagnosed through screening colonoscopy.

6. Inflammatory Bowel Disease (IBD)

Includes:

  • Ulcerative colitis

  • Crohn's disease

Symptoms:

  • Bloody diarrhea

  • Abdominal pain

  • Weight loss

  • Frequent bowel movements

7. Diverticular Disease

Small pouches in the colon may suddenly bleed.

Bleeding may be:

  • Heavy

  • Painless

  • Bright red

Immediate medical attention is required.

8. Intestinal Infection

Certain bacterial infections can cause:

  • Bloody diarrhea

  • Fever

  • Vomiting

  • Abdominal cramps

When Should You Seek Medical Attention Immediately?

Consult a doctor urgently if you experience:

  • Large amounts of blood

  • Continuous bleeding

  • Black tarry stool

  • Severe abdominal pain

  • Dizziness or fainting

  • Rapid heartbeat

  • Persistent vomiting

  • Fever with bloody diarrhea

These symptoms may indicate significant gastrointestinal bleeding requiring emergency treatment.

Warning Signs That Could Suggest Colon Cancer

Please consult a gastro surgeon if you notice:

  • Blood in stool lasting more than a few days

  • Change in bowel habits for over three weeks

  • Pencil-thin stools

  • Unexplained weight loss

  • Persistent fatigue

  • Iron deficiency anemia

  • Family history of colorectal cancer

  • Age above 45 years

Early diagnosis saves lives.

How Is the Cause Diagnosed?

Dr. Keyur Bhatt may recommend:

Physical Examination

Including examination for piles and fissures.

Blood Tests

To detect:

  • Anemia

  • Infection

  • Inflammation

Stool Examination

To identify:

  • Hidden blood

  • Infection

  • Parasites

Colonoscopy

The gold standard investigation.

It allows:

  • Examination of the entire large intestine

  • Detection of polyps

  • Diagnosis of inflammatory bowel disease

  • Identification of cancer

  • Removal of polyps during the same procedure

  • Biopsy of suspicious lesions

Upper GI Endoscopy

Recommended if black stools suggest bleeding from the stomach or upper digestive tract.

CT Scan or CT Angiography

May be needed in patients with significant or ongoing gastrointestinal bleeding.

Treatment Depends on the Cause

Management varies according to the diagnosis.

Hemorrhoids

  • High-fiber diet

  • Increased water intake

  • Medications

  • Laser or minimally invasive procedures when needed

Anal Fissure

  • Stool softeners

  • Warm sitz baths

  • Topical medications

  • Surgery in chronic cases

Colon Polyps

  • Removal during colonoscopy to reduce the risk of cancer

Colorectal Cancer

Treatment may include:

  • Robotic surgery

  • Laparoscopic surgery

  • Chemotherapy

  • Radiation therapy (for selected rectal cancers)

Inflammatory Bowel Disease

  • Anti-inflammatory medications

  • Immunotherapy

  • Nutritional support

  • Surgery for complications

Can Blood in Stool Be Prevented?

Many causes can be reduced by maintaining good bowel health.

Eat a Fiber-Rich Diet

Include:

  • Fruits

  • Vegetables

  • Whole grains

  • Salads

Stay Hydrated

Drink adequate water daily to avoid constipation.

Exercise Regularly

Physical activity promotes healthy bowel function.

Avoid Excessive Straining

Treat constipation early.

Get Screened for Colon Cancer

Adults aged 45 years and older, or those with a strong family history, should discuss screening colonoscopy with their doctor.

 

Dr. Keyur Bhatt is an experienced GI, HPB, Colorectal, Laparoscopic, and Robotic Surgeon at SIDS Hospital, Surat, offering comprehensive care for digestive disorders. With expertise in advanced endoscopy, minimally invasive surgery, robotic colorectal procedures, and cancer surgery, he focuses on accurate diagnosis and evidence-based treatment tailored to each patient.