Postnasal drip is the excess mucus secreted by the glands of the nose and throat that may be felt as an irritation in the throat. Postnasal drip may occur due to the following reasons:
- Seasonal allergies.
- Cold weather.
- Pregnancy.
- Smoke.
- Adenoidal inflammation.
- Certain medications like antihypertensives and birth control pills.
- Reflux.
- Chronic obstructive pulmonary disease.
- Deviated nasal septum.