When a person has a cold, the mucous membranes swell. As a result, mucus accumulates between the sinuses and nasal cavities. A sinusitis can then develop there. When the symptoms last longer than six weeks, we speak of chronic nasal sinusitis. Chronic nasal sinusitis is often accompanied by nasal polyps.

In the Divi "Chronic nasal sinusitis with nasal polyps," patients are explained what nasal sinusitis and polyps are and how they occur. In addition, patients are explained about the different treatments available for this syndrome.