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...
Your respiratory system is protected by a special type of mucus, known as phlegm. Its job is to protect the lungs from stuff that could get in there, like dust, pollen or smoke. The stuff that makes it to your nose is called nasal mucus, or snot.our respiratory system is protected by a special type of mucus, known as phlegm. Its job is to protect the lungs from stuff that could get in there, like dust, pollen or smoke. The stuff that makes it to your nose is called nasal mucus, or snot.