Haemorrhoids are enlarged vascular cushions in the anal canal [3].

They can be classified as:

  • Internal (above the dentate line)
  • External (below the dentate line)

They can also be classified in terms of their degree of prolapse, which helps to aid treatment decisions [3]:

  • First-degree: completely internal
  • Second-degree: prolapse but reduce spontaneously
  • Third-degree: prolapse but reduce manually
  • Fourth-degree: cannot be reduced once prolapsed