Postnasal Drip

at Allergy & ENT Associates of Middle TN

Your body produces mucus constantly throughout the day—one to two quarts, to be exact. It mixes with saliva and is swallowed, which is a normal and harmless response you usually do not notice. When excess mucus is created or it becomes thicker than usual, it becomes noticeable as it runs down the back of the nose to the throat. This is known as postnasal drip.

Causes of Postnasal Drip

Excess mucus can be caused by a variety of factors, including:


  • Colds and flu



  • Allergies


  • Sinus infections


  • Cold temperatures


  • Bright lights


  • Certain foods


  • Hormonal changes (including pregnancy)


  • Fumes from chemicals or perfumes


  • Certain medications


  • Structural abnormalities such as a deviated septum


In some cases, the condition is not caused by too much mucus, but rather an inability to clear it away effectively, such as from a swallowing disorder.

Symptoms of Postnasal Drip

The primary symptom of postnasal drip is a sore and irritated throat. Although there is typically no infection accompanying postnasal drip, tissues in the throat may swell.


Postnasal drip may cause side effects such as:


  • Cough


  • Sore throat


  • Hoarseness


  • Ear infections


  • Sinus infections


Postnasal drip is also the most common cause of chronic coughing and may be especially bothersome at night.

Treatment for Postnasal Drip

Treatment depends on the cause. Over-the-counter medications such as antihistamines, decongestants and saline nasal sprays are often used successfully to manage symptoms.


Medications containing the mucus-thinning agent guaifenesin (Mucinex, Robitussin, etc.) may also help.


Other treatment options include irrigating the nasal passages using a Neti pot to remove excess mucus. Using a humidifier to moisten the air may also provide relief.


If a bacterial infection is the cause, antibiotics may be required. Gastroesophageal reflux disease (GERD), a frequent cause of swallowing problems, can be treated with antacids.

Frequently Asked Questions

  • What is postnasal drip?

    Postnasal drip occurs when excess mucus builds up or becomes thicker than normal and runs down the back of the nose into the throat.

  • Can postnasal drip cause a chronic cough?

    Yes. Postnasal drip is the most common cause of chronic coughing and can be especially bothersome at night.

  • What is the best treatment for postnasal drip?

    Treatment depends on the cause, but common options include antihistamines, decongestants, saline nasal sprays, mucus thinners such as guaifenesin, nasal irrigation, and humidifier use.

Call Allergy & ENT Associates at (615) 889-8802 to learn more or schedule an appointment.