The presence of postoperative anal stenosis after hemorrhoidal surgery cannot be determined by the index finger, but needs to be judged in conjunction with clinical manifestations. The clinical definition of anal stenosis is that the diameter of the anus and anal canal becomes smaller, the stool becomes thinner, it is difficult to defecate and the anus is painful when defecating, and the anus cannot pass through the index finger during the examination. Therefore, only the index finger can not determine the existence of anal stenosis, but also need to be combined with the patient’s usual defecation and the doctor’s examination to determine. It is recommended to go to the regular hospital anorectal department, under the comprehensive examination of professional doctors, such as through the medical history, defecation performance, stool pattern, anal fingerprinting, etc., clear results to see whether there is anal stenosis this kind of disease, and whether it is necessary to carry out the treatment, need to be a comprehensive assessment of the diagnosis. If anal stenosis exists, it can be treated with anal dilatation or surgery depending on the degree of the condition, followed by regular checkups and adjustment of treatment measures.