What causes chronic postnasal drip?
When there is an excess of nasal mucus, it can drain from the back of the sinuses (postnasal drip), down the throat, and into the stomach where it is digested. During a cold, mucus typically thickens and sticks in the throat, prompting the need to clear the throat or cough. Chronic postnasal drip can result from many causes, including a cold, allergies, infection, or a more serious condition. If you are experiencing postnasal drip that has lasted more than a week, ask your ear, nose, and throat specialist to examine you.
