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Post-nasal drip (PND), also known as upper airway cough syndrome (UACS), occurs when excessive mucus is produced by the nasal mucosa. The excess mucus accumulates in the back of the nose , and eventually in the throat once it drips down the back of the throat.
“This could be termed ‘post-nasal drainage,’ since that is what is actually happening,” Dr. Mayerhoff continues, noting that when people use the term “post-nasal drip,” it’s usually ...
A lot of different things can cause a cough. But coughs are usually broken down into two main categories: acute and chronic. Acute coughs are ones that come on suddenly, usually due to an illness.
If the sinus passage remains blocked, there is a chance that sinusitis may result. [6] If the mucus backs up through the Eustachian tube, it may result in ear pain or an ear infection. Excess mucus accumulating in the throat or back of the nose may cause a post-nasal drip, resulting in a sore throat or coughing. [6]
The three main chronic cough causes are: Post-nasal drip; asthma and asthma-like conditions; and gastroesophageal reflux disease, or acid-reflux disease.
[3] [4] This commonly includes nasal obstruction, sore throat, tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, and the common cold. [5]: 28 Most infections are viral in nature, and in other instances, the cause is bacterial. [6] URTIs can also be fungal or helminthic in origin, but these are less common. [7]: 443–445