Post-nasal drip Post-nasal drip Post-nasal drip (PND, also termed upper airway cough syndrome, UACS, or post nasal drip syndrome, PNDS) occurs when excessive mucus is produced by the nasal mucosa. The excess mucus accumulates in the back of the nose and eventually the throat once it drips down the back of the throat. It is caused by rhinitis, sinusitis, gastroesophageal reflux disease (GERD), or by a disorder of swallowing (such as an esophageal motility disorder). But also further sources such as an allergy, cold or flu and as a result of medications. However, researchers argue that the flow of mucus down the
Velar nasal velar nasal, though not as back as the prototypical uvular nasal - see that article for more information. Features of the 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