Dr. Lim Wye Keat

Patients commonly report that their sneezing and runny-nose get worse when going out under the sun, and that air-conditioning worsens their allergic rhinitis. They are half right. Changes in humidity, temperature and certain air pollutants have an independent irritant effect on the nasal mucosa. Air pollutants may be divided into indoor and outdoor categories. Examples of such irritants include cigarette smoke and car exhaust fumes.