 Background Surgical repair for inguinal hernia is the most common surgical procedure in the world. Since the introduction of repair with mesh reinforcement, relapses have decreased significantly. Recurrence of inguinal hernia affects only 1-2 after inguinal hernia repair IHR 1 and is no longer considered to be a big problem. One problem is that a large proportion of patients undergoing surgery develop chronic pain from the surgical area 2-4. New meshes, with new design and new materials are continuously being introduced, with the aim of reducing the incidence of chronic pain. One of the most common meshes in use today is the so-called double-mesh bi-layer mesh 1, 5. Several studies have shown that bi-layer mesh can lead to some gains for the patient initially after surgery, but there is no scientific evidence available that suggest that bi-layer mesh is superior the traditional tension-free mesh repair in the long term 6, 7. Several reports have shown that bi-layer mesh repair give results as good as the golden standard method, where a single sheet mesh is used. 