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2288 pages added, reviewed or updated during the last month (last updated: 20/4/2021)


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gastrointestinal haemorrhage

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Haematemesis, melaena or massive rectal bleeding are dramatic signs of gastrointestinal haemorrhage. It is important in such a case to assess the amount of blood loss and to determine the likely site of bleeding.

  • haematemesis indicates bleeding proximal to or including the duodenum
  • melaena usually results from upper gastrointestinal bleeding, although right-sided colonic and small bowel lesions can occasionally be responsible
  • massive rectal bleeding is usually from the distal colon, rectum or from a major bleeding site higher in the gastrointestinal tract

It is necessary to:

  • assess and replace blood loss
  • diagnose the source of blood loss
  • treat and control of source of bleeding

Last reviewed 01/2018

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