What Causes Post-Nasal Drip?
The glands in your nose and throat continually produce mucus (one to two quarts a day). It moistens and cleans the nasal membranes, humidifies air, traps and clears inhaled foreign matter, and fights infection. Although mucus normally is swallowed unconsciously, the feeling that it is accumulating in the throat or dripping from the back of your nose is called post-nasal drip. This feeling can be caused by excessive or thick secretions or by throat muscle and swallowing disorders.
