Fissure in Ano
Longitudinal tear in the lower end of anal canal results in Fissure in Ano.It occurs most commonly in the midline posteriorly, the least protected part of the Anal canal.
Pathology of Pain
Fissure starts proximally at the dentate line. So,whole of the anal fissure lies in the sensitive skin of the anal canal and that’s why Pain is the most prominent symptoms.