As world statistics show, 60% of patients with chronic rhinosinusitis develop bronchopulmonary pathology. According to foreign authors, the number of patients with chronic rhinosinusitis increases annually by 1.5-2%, and today more than 2/3 of inpatients are affected by this pathology. Due to the anatomical, physiological and complementary characteristics of the upper and lower respiratory tracts, there is a tendency towards a protracted course of rhinosinusitis, which in turn leads to the spread of the infectious process to the lower respiratory tract. It should be noted that existing foci of infection in the upper respiratory tract spread to the lower respiratory tract through microaspiration after an acute respiratory illness, which is the cause of the development of chronic bronchitis, bronchial asthma, and in particular pneumonia.