Fissure in Ano
Synonyms
Anal Fissure
Anal Ulcer
Anal Ulcers
Fissure, Anal
Ulcer, Anal
Ulcers, Anal
A painful linear ulcer at the margin of the anus. It appears as a crack or slit in the mucous membrane of the anus and is very painful and difficult to heal. (Dorland, 27th ed & Stedman, 25th ed)