Management and treatment guidelines for rhinosinusitis and nasal polyps have been published by the European Academy for Allergy and Clinical Immunology (EAACI) task force in 2005, and have recently been updated. These guidelines are evidence-based and internationally recognized, and form the basis for the here presented "Belgian Guidelines for the treatment of ARS in general practice", developed by the sinusitis committee. This document is intended to establish evidence-based management procedures for ARS, one of the most frequent upper airway diseases, mostly treated by the general practitioner. It is recommended to treat ARS with topical glucocorticosteroids 200 mcg BID. Antibiotics are recommended for the treatment of severe ARS, if need be, together with topical glucocorticosteroids BID.