Oslo Airport (OSL) Oslo Airport (OSL) One of three airports serving the Oslo region, Oslo Airport (OSL) is the second-busiest airport in Scandinavia and the 17th busiest in Europe. It serves as a hub for Air Norway, Norwegian Air Shuttle, Scandinavian Airlines and WiderÃ¸e.
Causes of Sinus Infection. Knowing the causes of sinus infection is beneficial to the patient and the layman for prevention of recurrent sinus infections! The most common cause of a sinus infection is the common cold, viral influenza and hay fever. The cold causes inflammation in the nasal passages and this inhibits the drainage of the sinuses which can cause them to become inflamed. When we have flu, our nose is filled with mucus.
On the surface of things, the cause of sinus trouble is clear. Teeny holes that connect your nasal passages to your sinuses (basically a collection of hollow, moist cavities that lurk beneath your nose, eyes, and cheeks) get blocked. Then gunk builds up in your sinuses, germs may grow, and you feel, well, hideous. But the cause of the blockage is sometimes trickier to figure out. Here are 13 things that can cause an acute sinus infection (the most common type) and, in some cases, lead to a chronic sinus infection. Next: Viruses.