The main symptom of anastomotic stenosis after hemorrhoid surgery is abnormal bowel movements, such as difficulty in defecation, pain in defecation, and thinning of stools. Abnormal defecation is the main symptom of anastomotic stenosis after hemorrhoid surgery, including difficulty in defecation, pain in defecation, and thinning of stool. The anastomosis in hemorrhoid surgery removes too much skin from the mucosa of the anal canal and rectum, or damages too much anal sphincter, which will result in a significant increase in the anastomotic ring scar and contracture of the scar tissue, resulting in stenosis at the anal canal anastomosis, leading to difficulty in defecation such as obvious pain when defecating in dry stools, and the appearance of thinning of the stool due to the stenosis, and other phenomena. Postoperative anastomotic stenosis of hemorrhoids can be clearly diagnosed through medical history, symptoms, anal diagnosis, anoscopy and other examinations. Patients may experience prolonged bowel movements, thinning of stools, pain or bleeding due to the narrowing of the anal canal, which prevents feces from passing through the canal in its normal form. Prolonged defecation abnormalities may also lead to lower abdominal distension, abdominal pain and other discomforts. It is recommended that patients with these symptoms should be diagnosed and treated as soon as possible to avoid aggravating their condition and affecting their normal life.