Postnasal drip is when mucus from the nasal cavity and sinuses drains into the throat. Postnasal drip can cause a sore throat, laryngitis, a cough, bad breath, hoarseness, and sometimes wheezing.
Postnasal drip often improves on its own, but if it lingers it may need treatment.
Current as of: May 1, 2026
Author: WebMD Ignite Staff
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