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
Nasal infix forms and the reflexes (corresponding forms) in an attested daughter language. The Latin reflexes of the PIE aorist came to be used as the perfect. It is uncertain whether had a nasal infix already in PIE, since Greek is only attested after Homer. In J. R. R. Tolkien's constructed language Quenya, the nasal infix forms the past tense of verbs ending in any consonant besides "-m", "-n", or "-r". Thus, "cen-" "to see" has the past tense "cen-në", but "mat-" "to eat" has not "*mat-në" but the metathesised "ma⟨n⟩t-ë". Nasal infix The nasal infix is a reconstructed nasal consonant or