Two years after inguinal hernia surgery, localized pain still occurs, which may be due to patch reaction, postoperative infection or adhesion. 1. Patch reaction: during inguinal hernia surgery, patch is needed to repair the weak or defective abdominal wall, and patch is a foreign body to human organism, so it will have rejection reaction and cause pain at the repair site. 2. Postoperative infection or adhesion: After inguinal hernia surgery, if you don’t take good care of the wound or other factors, it may cause postoperative wound infection, which leads to pain and fever. And postoperative adhesion, a common complication after surgery, causes pain when the surgical site of inguinal hernia causes intra-abdominal adhesions. When the mentioned symptoms occur, it is recommended to visit the hospital for early treatment.