Rhinosinusitis is common in the pediatric population; however, diagnostic and management techniques often differ when compared with adult rhinosinusitis. Multidisciplinary guidelines have outlined the diagnostic criteria for pediatric rhinosinusitis. Although acute rhinosinusitis is a more infectious phenomenon, chronic sinusitis involves a more multifactorial etiology. This article outlines some of the definitions of rhinosinusitis, diagnosis and management of pediatric sinusitis, and the complications of rhinosinusitis seen in the pediatric population.