To determine whether anal stenosis occurs after hemorrhoid surgery, a series of clinical symptoms should be integrated after the wound heals for about 1 month after surgery. Post-operative anal stenosis is a common post-operative complication, mainly due to improper operation, excessive damage to the skin of the anal canal, and failure to preserve sufficient skin bridges between the hemorrhoid nuclei. The clinical manifestations of patients specifically include difficulty in defecation, pain and bleeding, changes in bowel habits such as increased frequency of defecation, anal incontinence, and leakage of stool or secretions. If a patient has any of these symptoms, it is recommended that he or she go to a hospital and ask a specialist to perform an anal finger examination and anoscopy. If the anoscope is difficult to enter the anus, or even the physician’s index finger, the diagnosis of anal stenosis can be confirmed. In addition, after hemorrhoid surgery, patients need to keep the incision clean and disinfected, and they need to keep their bowels open, avoid spicy and stimulating food stimulation, and those with signs of anal stenosis should undergo early anal dilation intervention to effectively prevent anal stenosis.