Mixed hemorrhoid surgery may cause pain, bleeding, urinary retention, anal canal stenosis, infection and other discomforts. 1. Pain: As anesthesia is applied during the surgery, no pain will be felt for a while, but after the anesthesia wears off, pain will occur locally due to the continuous contraction of the sphincter muscle. 2. Bleeding: Mixed hemorrhoid surgery is after all a traumatic operation, so a small amount of blood may leak from the wound after the operation. 3. urinary retention: mainly because of the mixed hemorrhoid surgery needs to be lumbar anesthesia, resulting in bladder muscle relaxation and weakness, and then there will be poor urination, causing reflex urinary retention. 4. anal canal stenosis: if the mixed hemorrhoid surgery inadvertently damage the sphincter or anal canal muscle layer, it is easy to cause scar contraction, so it will cause anal canal stenosis. 5. Infection: after hemorrhoid surgery, the rectum and anal canal still need to defecate, so the wound is easy to be contaminated by feces, and then infection occurs. For patients who have had mixed hemorrhoid surgery, they need to cooperate with the doctor for active treatment, strengthen the daily life management, do a good job of regular disinfection and change of medication, and regular outpatient follow-up.