Eliminating environmental factors, such as climate and pollutants, is not always possible, but they can often be controlled. A person who is allergic and susceptible to sinus disorders should avoid cigarette smoke and other air pollutants. Inflammation in the nose caused by allergies predisposes a patient to a strong reaction to all irritants. Drinking alcohol also causes the nasal-sinus membranes to swell.

Sinusitis-prone persons may be uncomfortable in swimming pools treated with chlorine, since it irritates the lining of the nose and sinuses. Divers often experience congestion with resulting infection when water is forced into the sinuses from the nasal passages.