The Lichtenstein technique is modified for solving complex groin hernias such as huge hernias with massive transversal fascia destruction associated with the increased intraabdominal pressure or recurrent hernias with the destroyed Poupart's ligament. Whilst these hernias are usually managed by preperitoneal techniques (open or laparoscopic) under general or regional anesthesia, as an "inpatient" procedure, they can be solved applying a modified Lichtenstein technique, most frequently under local anesthesia, as an "out-patient" procedure. The modifications of Lichtenstein technique include the foIlowing: a) lateral movement and fixation of the lower corner of the mesh, caudally to the tubercle, by 20-30 degrees in relation to its lower border, fully protecting the medial triangle (direct inguinal recurrence prevention); b) fixation of the lower border of the mesh by a running "U" suture to both Poupart's and Coopers's ligaments, from the tubercle to the femoral vein, fully protecting the femoral triangle (femoral recurrence prevention); c) the lower mesh border fixation by a running suture, 2-3 cm laterally to the internal inguinal ring, together with the "locking" of the internal inguinal ring by two interrupted sutures, one fixing the superior mesh tail to the inferior one--cranial to the spermatic cord, 1-1,5 cm medially to the Poupart's ligament, and the other fixing the lower border of the superior mesh tail and the lower border of the inferior mesh tail to the inferior part of the Poupart's ligament, 1 cm cranially and laterally to the preceding suture, fully protecting the lateral triangle (indirect inguinal recurrence prevention).