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
Velar nasal Velar nasal The velar nasal, also known as agma, from the Greek word for fragment, is a type of consonantal sound, used in some spoken languages. It is the sound of "ng" in English "sing". The symbol in the International Phonetic Alphabet that represents this sound is , and the equivalent X-SAMPA symbol is codice_1. The IPA symbol is similar to , the symbol for the retroflex nasal, which has a rightward-pointing hook extending from the bottom of the right stem, and to , the symbol for the palatal nasal, which has a leftward-pointing hook extending from the bottom of