What is postnasal drip?
Postnasal drip occurs when extra mucus from the nose and sinuses drips down the back of the throat. This can cause a feeling of something "dripping" or "tickling" in your throat. Common signs include frequent throat clearing, coughing, or a persistent sore throat.
What are causes of postnasal drip?
One of the most frequent causes of postnasal drip is allergies, especially allergic rhinitis (also known as hay fever). Allergic rhinitis happens when your body reacts to allergens like pollen, dust mites, mold, or pet dander. This causes inflammation in the nose, leading to symptoms such as a runny or stuffy nose, sneezing, itchy eyes, and post nasal drip. These allergy symptoms can occur seasonally or year-round.
Other common causes can include:
- Allergies – Seasonal or environmental allergens often trigger excess mucus.
- Colds and sinus infections – These irritate the nasal passages and increase mucus production.
- Irritants like smoke, pollution, or strong odors.
- Weather changes or dry air.
- Non-allergic rhinitis – Irritation or nerve stimulation causing symptoms without an allergy.
- Silent reflux – Acid reflux that irritates the throat without typical heartburn symptoms.
What are the symptoms of postnasal drip?
Symptoms you might notice include:
- Sensation of mucus dripping down your throat
- Frequent throat clearing
- A nagging sore throat or scratchiness
- Cough, especially at night
- Hoarseness or a tickling feeling in the throat
How is postnasal drip diagnosed and treated?
Your healthcare provider will diagnose postnasal drip mainly through your medical history and symptoms. They might perform a physical exam to check your nasal passages and throat. Allergy testing or imaging could be recommended if allergies or sinus issues are suspected.
Treatment focuses on managing the underlying cause:
- Avoid triggers – Seeing a board-certified allergist can help identify what causes your symptoms — whether it’s pollen, dust, mold, or pet dander — so you can reduce exposure.
- Medications – Nasal steroid sprays (like fluticasone or mometasone) reduce inflammation and mucus production. It’s important to use these correctly for best results.
- Antihistamines – Non-drowsy antihistamines (such as cetirizine or fexofenadine) help control allergy symptoms like sneezing and itching.
- Saline nasal rinses – These can clear mucus and soothe nasal passages.
- Humidifiers – Adding moisture to dry air can ease throat irritation.
- Avoid irritants – Stay away from smoke, pollution, or strong smells that can worsen symptoms.
If symptoms persist or are severe, your allergist may recommend prescription treatments or immunotherapy (allergy shots) tailored to your needs.
When should I see a doctor?
If postnasal drip causes ongoing discomfort, persistent sore throat, or interferes with your daily life, it’s a good idea to seek medical advice. A board-certified allergist can help find the right diagnosis and treatment plan so you can breathe easier and feel better.
For any questions regarding postnasal drip or drainage, schedule an appointment online with our board-certified allergists or call 515.875.9260.