Don't Ignore Blood in Stool
Rectal bleeding — blood in or on your stool, on toilet paper, or in the toilet bowl — is a symptom that should never be dismissed. While it is most commonly caused by benign conditions like haemorrhoids or anal fissures, it can also be a sign of colorectal cancer, polyps, or inflammatory bowel disease. Dr. Raman Garg, Senior Surgical Gastroenterologist at Bombay Gastro & Cancer Institute, Bathinda, provides expert evaluation and treatment for all causes of rectal bleeding.
Common Causes of Rectal Bleeding
Haemorrhoids (Piles)
Most common cause. Swollen veins in rectum/anus. Bright red blood, painless or painful. Laser treatment available.
Anal Fissure
Small tear in anal lining. Bright red blood with severe pain during defecation. Treatable medically or surgically.
Colorectal Polyps
Benign growths that can bleed and turn cancerous. Removed during colonoscopy (polypectomy).
Colorectal Cancer
Cancer of colon or rectum. Blood may be bright red or occult. Requires urgent evaluation.
Inflammatory Bowel Disease
Crohn's disease or ulcerative colitis. Blood mixed with mucus, urgency, diarrhoea.
Diverticular Disease
Bleeding from diverticula (small pouches in colon wall). Often painless, may be heavy.
Infectious Colitis
Bacterial infection (Salmonella, E. coli). Bloody diarrhoea with cramping.
Rectal Prolapse
Rectum protrudes outside. Bright red bleeding with mucous discharge.
Emergency Warning Signs
Call emergency services immediately for:
- Heavy rectal bleeding that doesn't stop
- Passing large blood clots
- Black, tarry stools (melena) — indicates upper GI bleeding
- Bleeding with severe abdominal pain
- Bleeding with dizziness, fainting, or rapid heartbeat
- Signs of shock — pale, cold, clammy skin, confusion
Understanding Blood Colour
Diagnostic Work-Up
- Digital rectal examination (DRE) — first-line clinical assessment
- Proctoscopy / Anoscopy — direct visualization of anus and lower rectum
- Flexible sigmoidoscopy — visualizes rectum and lower sigmoid colon
- Colonoscopy — gold standard; visualizes entire colon
- Complete blood count — assess for anaemia from chronic blood loss
- Stool occult blood test — detects hidden (occult) blood
- CT angiography — for brisk, unlocalized bleeding
Treatment Options
- Haemorrhoids — rubber band ligation, sclerotherapy, laser haemorrhoidectomy, surgical haemorrhoidectomy
- Anal fissure — topical creams, botulinum toxin injection, lateral internal sphincterotomy
- Polyps — endoscopic polypectomy (removed during colonoscopy)
- Colorectal cancer — laparoscopic colectomy ± chemotherapy
- IBD — medical therapy (mesalamine, steroids, biologics)
- Diverticular bleeding — usually self-limiting; embolization or surgery for persistent bleeding
- Infectious colitis — appropriate antibiotics and supportive care