Materials and methods: In a comparative cross-sectional descriptive study, sixty ASA I-II children less than 6 years old scheduled for elective subumbilical surgery were randomized to divide into 2 groups: group 1 (control group) were only used general anethesia with laryngeal mask, group 2 (levo group) were anesthetized under general anaesthesia with laryngeal mask and caudal block with levobupivacaine 0.25% 1mL / kg to relieve pain after surgery.