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Dr Mohd Fadhil General Surgeon

Health information

Blood in the Stool: Haemorrhoids or Cancer?

Colorectal & perianal · 1 min

Why blood colour alone is not enough to determine the cause.

Why the colour alone does not tell you the cause

Rectal bleeding is not always caused by haemorrhoids, and the colour of the blood by itself cannot tell you the cause. That is why bleeding is assessed rather than assumed.

Illustration of the anal canal showing internal and external haemorrhoids.

How it is assessed

  • Review of symptoms and bowel habits
  • Examination of the anus and rectum
  • Proctoscopy when appropriate
  • Colonoscopy may be advised depending on age, risk factors and symptoms

If I see blood, can I assume it is haemorrhoids? No. The cause of bleeding should be assessed, particularly if it is recurrent or accompanied by a change in bowel habits.

If your symptoms persist or you are unsure of the cause, arrange an assessment.

Haemorrhoids are swollen blood vessels in and around the anal canal. They can cause bleeding, a lump that protrudes from the anus, itching or discomfort. However, rectal bleeding can also be caused by anal fissures, polyps, bowel inflammation or colorectal cancer.

When should you be assessed?

  • Fresh red blood during bowel movements
  • A lump protruding from the anus
  • Itching, mucus or discomfort
  • Pain or swelling at the anal margin
  • Recurrent symptoms despite medication

Treatment Options

Treatment depends on the grade and symptoms of the haemorrhoids. It may begin with high fiber diet, adequate fluid intake, stool softeners and medication. If symptoms persist, procedures or surgery may be discussed according to the type of haemorrhoid and the patient’s needs.

Read More: Haemorrhoids

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    Why blood colour alone is not enough to determine the cause.

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