Abstract
It was confirmed in the author's experiment that the most susceptible site in the nasal and nasopharyngeal cavity to contamination of air pollutants is, next to the anterior portion of the nasal cavity, the upper surface of the soft palate.
The amount of dust and dirt in the nasal vestibule which is thought to be closely related with air pollution was measured in people of various places in Tokyo and the highest contamination of the nasal vestibule was found in people of Koto district.
Asymptomatic inflammation of the upper surface of the soft palate may acutely be exacerbated by inhalation of air pollutants or by other causes and there is an intimate relationship between the acute exacerbation of inflammation and allergy or rheumatic diseases.
