Postnasal drip occurs when excessive mucus is produced in the nasal passages and drips down the back of the throat. It is a common symptom of allergies, nasal irritants, and bacterial and viral infections that cause your nose to increase mucus.
Postnasal drip occurs when excessive mucus is produced in the nasal passages and drips down the back of the throat. It is a common symptom of allergies, nasal irritants, and bacterial and viral infections that cause your nose to increase mucus.