A nurse telephone follow-up can significantly reduce pain intensity of adults who undergo ambulatory surgery. This intervention is defined as multiple telephone calls made to the patient by a nurse, after discharge, to provide information, and review discharge prescriptions and management of care by the patient himself or by a care-giver. Only a few studies have explored nurse telephone follow-up for children who underwent tonsillectomy. The design of these studies, including the time-periods chosen for data collection, were not properly determined to adequately evaluate the impact of the intervention on management of pain and prevention of postoperative complications. Thus, we planned to determine if a nurse telephone follow-up, made to parents following their child's tonsillectomy, would contribute to decrease pain intensity, incidence of postoperative complications and resort to other healthcare services.