Women undergone hysterectomy for 1-3 years previously and suffering from persistent pain 6 months after surgery. The patients are invited to participate in this study, if they have participated in previous studies "Sevoflurane, Propofol, Postoperative pain" by Yli-Hankala and Pokkinen and study:" Vaginal hysterectomy, laparoscopic hysterectomy, postoperative pain" by Yli-Hankala and Pokkinen.