An anal fissure is a/are/may be a small, painful cut in the lining of the anus. This condition/situation/problem commonly occurs/happens frequently/develops often due to passing/forcing/straining during bowel movements, https://m.facebook.com/proctologiaclinica/videos/a-fissura-anal-%C3%A9-uma-patologia-comum-no-dia-a-dia-do-coloproctologista-em-geral-/1036713350918143/