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Anal continence requires the apposition of three mucosal pads which:
- are composed of subepithelial vascular cushions
- are found in the left lateral, right anterolateral and right posterolateral portions of the anal canal
- form haemorrhoids when the pads become enlarged and congested
Haemorrhoids may cause:
- anal pain
- pruritus ani
- bright red rectal bleeding
Haemorrhoids are very common and can occur at any age.
Last reviewed 01/2018