Nasal spray oil are also available. There is however no trial-verified evidence that they have a measurable effect on symptoms. Decongestant nasal sprays are available over-the-counter in many countries. They work to very quickly open up nasal passages by constricting blood vessels in the lining of the nose. Prolonged use of these types of sprays can damage the delicate mucous membranes in the nose. This causes increased inflammation, an effect known as rhinitis medicamentosa or the rebound effect. Decongestant nasal sprays are advised for short-term use only, preferably 5 to 7 days at maximum. Some doctors advise to use them 3 days
Nasal concha in the ankylosaurid dinosaur "Saichania". Nasal concha In anatomy, a nasal concha (), plural conchae (), also called a turbinate or turbinal, is a long, narrow, curled shelf of bone that protrudes into the breathing passage of the nose in humans and various animals. The conchae are shaped like an elongated seashell, which gave them their name (Latin "concha" from Greek "κόγχη"). A concha is any of the scrolled spongy bones of the nasal passages in vertebrates. In humans, the conchae divide the nasal airway into 4 groove-like air passages, and are responsible for forcing inhaled air to flow in