Frequency of preauricular sinus differs depending the population: 0.1-0.9% in the US, 0.9% in the UK, and 4-10% in Asia and parts of Africa. Comparative frequency is known to be higher in Africans and Asians than in Caucasians. Preauricular sinuses are inherited features, and most often appear unilaterally.
Rhinitis is inflammation of the nasal cavity lining (inside the nose). It is often caused by allergies. It may also be caused by environmental factors such as pollution, weather changes, stress, infections, and som...
The second function of the nose is perhaps more important nowadays. Within the head there are two cavities (one for each nostril) called the Nasal Cavities, separated by the Nasal Septum. Withing the nasal cavities are curved peices of bone called Concha (or Turbinates).