Anal fissure

Anal fissures are small ulcers on the entire surface of the anal canal skin below the dentate line. Its direction is parallel to the longitudinal axis of the anal canal, and is about 0.5 to 1.0 cm in length. It is fusiform or elliptical in shape and has difficulty healing. Superficial lacerations of the anal canal cannot be regarded as anal fissures, because they can heal quickly and are often asymptomatic. Anal fissures occur in the middle of the anal canal. If there is an anal fissure on the side of the anal canal, or there are multiple slits, it should be thought that it may be an early manifestation of intestinal inflammatory diseases.

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