OBJECTIVES: To review the pathogenic mechanisms and treatment of sinusitis in children.METHODS: Mucopurulent secretion and halitosis are important signs and symptoms for the diagnose of sinusitis. The radiographic and computorized tomography investigations confirm the sinusal disease.RESULT: The identification of the main pathogens involved in the acute and chronic sinusitis is fundamental to give a better therapeutic control to these patients. CONCLUSIONS: Rhinosinusitis is one of the most reported diseases among the general population, and its prevalence has been rising in the last years. Many questions remain unanswered about its cause, pathophysiology and optimal treatment, especially in the pediatric population, generating health care costs and a high rate of morbidity.