Blood in Stool: Causes & When to See a Doctor

Bright red blood during or after a bowel movement is one of the most common reasons people see an ano-rectal specialist. Here's what it could mean and when to act.

Common Causes of Rectal Bleeding

Most rectal bleeding is caused by benign, treatable ano-rectal conditions. However, any persistent bleeding should be assessed by a doctor to rule out other causes.

• Piles (haemorrhoids) — the most common cause
• Anal fissure — a tear causing sharp pain and bleeding
• Fistula — with discharge
• Rectal polyp — especially in children

When Should You See a Doctor?

See a specialist promptly if bleeding is persistent or heavy, if you notice a change in bowel habits, dark or mixed blood, weight loss, or if you are over 40. Early assessment gives the best outcomes.

Frequently Asked Questions