Milder stenoses of the anal canal and rectum can be treated with anal dilation. An anal dilator can be used to dilate the anus once a day for 15 minutes each time. In the absence of a dilator, the anus can be dilated with an anal mirror or by inserting a finger into the anus. Moderate or severe stenosis or stenosis that is not treated by dilation must be treated surgically. The following surgical methods are commonly used for anal canal stenosis: (1) posterior linear incision of the anal canal: regular postoperative dilation should be performed to prevent recurrence of stenosis. (2) Longitudinal incision and transverse suture: the stenosis area is incised longitudinally and then sutured transversely. (3) Y-V anus formation: A “Y” shaped incision is made at the front and back of the anus, and the tip of the skin is pulled into the anal canal and sutured after separation, so that the “Y” shaped incision becomes a “V” shaped incision. The “Y”-shaped incision is transformed into a “V”-shaped incision. (4) Tipped flap anoplasty: After excision of the anal canal scar, a tipped flap of the same size and shape as the excised scar is selected near the anal verge and transferred to the excised wound after freeing and suturing. (5) Tubular implantation: It is suitable for anal loop stenosis, which is equal to making a brand new anal canal. After surgery, defecation should be controlled and the wound should be regularly dilated after healing to prevent new stenosis caused by contracture of the skin piece. Commonly used surgical methods for rectal stenosis are: (1) Hanging wire therapy: Applicable to the annular stenosis of the lower rectum, the main point is to hang a rubber band on the stenosis ring, tighten the wire and then strangle the stenosis ring. (2) Endorectal incision and suture: After cutting off the stenosis ring and removing the scar tissue, the upper and lower mucosa is separated and pulled over the wound and sutured. For those who have contraindications to surgery or temporarily cannot be treated surgically, the symptoms can be temporarily controlled by softening the stool, such as giving 5g of hemp pills, twice a day; 3-9g of liquid paraffin or senna, taken in lieu of tea before going to bed; soapy water or warm saline enema can also be used for those who have constipation.