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Post-Nasal Drip


Updated December 03, 2010

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.


Post-nasal drip refers to the draining of mucus from the back of the nose down the throat.

Post-nasal drip is most often noticed when a person has abnormally thick mucus due to a cold, flu, allergies, or sinusitis. It may also occur when someone has a throat or swallowing disorder, or be caused by nasal injury.

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