Fissure in Ano is a tear in the anus causing a painful linear ulcer at the margin of the anus. It may cause itching, pain or bleeding. Fissures can extend upward into the lower rectal mucosa; or extend downward causing a swollen skin tag to develop at the anal verge, also known as a sentinel pile.Human body has a spontaneous reflex in which any pain in the sensitive lower part of anus causes reflex contraction (spasm) of the sphincter muscle. So the tear caused in the lower anal canal leads t...Read more

Fissure in Ano is a tear in the anus causing a painful linear ulcer at the margin of the anus. It may cause itching, pain or bleeding. Fissures can extend upward into the lower rectal mucosa; or extend downward causing a swollen skin tag to develop at the anal verge, also known as a sentinel pile.Human body has a spontaneous reflex in which any pain in the sensitive lower part of anus causes reflex contraction (spasm) of the sphincter muscle. So the tear caused in the lower anal canal leads to sphincter muscle spasm. The resultant sphincter muscle spasm makes passage of even normal stools difficult and painful which further increases the spasm of sphincter muscle there by starting a vicious cycle.

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