After hemorrhoid surgery, the buttock swelling and pain, most consider the wound bleeding and swelling, postoperative secondary infection abscess formation and other factors. 1. Wound bleeding and swelling: postoperative prolonged sitting and standing, stool dryness and other factors may trigger incision bleeding, resulting in swelling of the surrounding tissues, and even stimulate the nociceptive nerve, the patient consciously anal pain obvious, anal drop and other discomforts. 2. Postoperative secondary infection: improper postoperative drainage, trauma contamination, etc. can lead to postoperative secondary infection, and then the formation of abscess or anal fistula, resulting in patients with anal distension and pain. Therefore, early postoperative pain, a small amount of bleeding and other discomforts are common phenomena, in order to understand the condition, it is recommended that patients go to the hospital in a timely manner, a clear diagnosis, to be the appropriate treatment program.