Nasal hair Nasal hair Nasal hair or nose hair is the hair in the nose. Adult humans have hair in the interior nasal passage. Nasal hair functions include filtering foreign particles from entering the nasal cavity and collecting moisture. In support of the first function, the results of a 2010 study indicated that increased nasal hair density decreases development of asthma in those who have seasonal rhinitis, possibly due to an increased capacity of the faces to filter out pollen and other allergens. Nasal hair should not be confused with cilia of the nasal cavity, which are the microscopic cellular strands that,
Post-nasal drip back of the throat from the nasal cavity is a normal physiologic process that occurs in all healthy individuals. Post-nasal drip has been challenged as a syndrome and instead is widely viewed as a symptom by various researchers as a result of the wide variation amongst differing societies. Furthermore this rebuttal is reinforced due to the lack of an accepted definition, pathologic tissue changes, and available biochemical tests. PND may present itself through the constant presence of discomfort within an individual's upper airways as a result of the transportation of mucus from nasal membranes down the back of the throat