A randomized, double blind study was carried out in 76 paediatric surgical patients scheduled for herniography or circumcision. Patients were randomly assigned to receive ilioinguinal and iliohipogastric nerve block (group A), penile block (group B), caudal block (group C) or metamizol intravenously (group D). Postoperative pain was evaluated by Objective pain scale at the end of surgical process and at 15, 30, 60 minutes and 6 hours after surgery. Pain free time was also recorded. There was no difference between groups regarding demographic data. We find a significatively less pain scores in the children who received regional anaesthesia. In those groups the administration of any analgesic were not necessary. No side effects were recorded. We conclude that locorregional anaesthesia techniques are safe and effective for minor surgery in children, because they are easy to carry out, comfortable for the patient, and provide a good postoperative analgesia.