[Surgery-induced abdominal wall nerve entrapment: do not overlook intensive postoperative pain].

The most common cause of persistent postoperative pain after inguinal hernia repair is entrapment of a sensory nerve in the wound closure, The pain may be triggered by touching the skin, and the pain is relieved after a nerve block. In two patient cases, division of the nerve immediately terminated the pain, and the relief seemed to be permanent. Pains are common in inguinal hernia scars, but also after an appendectomy operation and Pfannenstiel's incision.