肛裂是肛管上皮过度伸展造成的肛门上皮的裂伤 ,继而形成慢性感染性小溃疡 ,多发于肛管后方正中部。有时可并发肛瘘与肛旁脓肿。肛裂位于肛管侧方时要注意有无Ｃｒｏｈｎ病、结核、肿瘤、梅毒等的可能。1　肛裂的诊断　　肛裂的典型症状是疼痛与便血。肛裂的疼痛剧烈 ,有典型的 Anal fissure is an anal epithelial epithelial laceration caused by excessive extension of the anal canal, and then the formation of chronic infectious small ulcers, mainly in the middle of the rear of the anal canal. Sometimes complicated by anal fistula and perianal abscess. Anal fissure in the side of the anal canal to pay attention to the availability of Crohn disease, tuberculosis, cancer, syphilis and so on. A diagnosis of anal fissure Anal fissure is a typical symptom of pain and blood in the stool. Anal fissure pain, there are typical