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Differential diagnosis

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The other common cause of a localised anal swelling is the perianal haematoma. This lesion is always covered by skin, which distinguishes it from the mucosa-covered prolapsed haemorrhoid.

Another cause of bright red blood passed per rectum associated with the passing of stools is an anal fissure.

Other differentials are:

  • rectal prolapse
  • anal polyp
  • inflammatory bowel disease
  • rectal carcinoma
  • anal carcinoma
  • genital warts
  • threadworms (pruritis ani)

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