Congenital anorectal stenosis is caused by abnormal embryonic development, which leads to too small anorectal caliber, which can be seen by both men and women, and is characterized by different degrees of poor defecation.

Treatment: Appropriate treatment should be selected according to the degree and type of stenosis. In most cases of mild stenosis, repeated and continuous anal dilatation can restore normal defecation function. Severe stenosis requires surgery, and the timing of surgery should be chosen as far as possible before obstruction. Nasal septum resection is feasible for simple anal membrane stenosis.

For anal canal stenosis, longitudinal transverse suture or anal canal Y-V flap plasty can be selected to enlarge the diameter of anal canal. The stenosis at the junction of anal canal is annular because of stenosis, and the effect of stenosis release is very good. Rectal stenosis and anorectal stenosis are often difficult to operate from perineum because of the wide range or high position of the lesion, and it is difficult to achieve the goal by reluctantly releasing the stenosis, and there is still the possibility of scar stenosis after operation.

Therefore, abdominoperineal anoplasty should be adopted. In addition, after various surgical treatments, it is necessary to dilate the anus, generally starting from 2 weeks after operation and lasting for 3 ~ 6 months, until the anal canal can pass through the index finger, and the defecation is smooth to prevent scar contracture from narrowing again.