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What causes postnasal drip?

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The excess mucus that triggers postnasal drip has many possible causes, including:

  • Colds
  • Flu
  • Allergies , also called allergic postnasal drip
  • Sinus infection or sinusitis , which is an inflammation of the sinuses
  • Object stuck in the nose (most common in children)
  • Pregnancy
  • Certain medications , including some for birth control and blood pressure
  • Deviated septum , which is the crooked placement of the wall that separates the two nostrils, or some other problem with the structure of the nose that affects the sinuses
  • Changing weather, cold temperatures, or really dry air
  • Certain foods (for example, spicy foods may trigger mucus flow)
  • Fumes from chemicals, perfumes, cleaning products, smoke, or other irritants

From: What Is Postnasal Drip? WebMD Medical Reference

SOURCES:

American Academy of Otolaryngology -- Head and Neck Surgery: "Post-Nasal Drip."

Chao, T.  , 2008. The Journal of Laryngology & Otology

St. John Providence Health System: "Postnasal Drip."

Mason R. , 4th ed., 2005. Murray & Nadel's Textbook of Respiratory Medicine

Chung, K.  , April 2008. The Lancet

Pratter, M.  , January 2006. Chest

 

 

Reviewed by Louise Chang on August 06, 2018

SOURCES:

American Academy of Otolaryngology -- Head and Neck Surgery: "Post-Nasal Drip."

Chao, T.  , 2008. The Journal of Laryngology & Otology

St. John Providence Health System: "Postnasal Drip."

Mason R. , 4th ed., 2005. Murray & Nadel's Textbook of Respiratory Medicine

Chung, K.  , April 2008. The Lancet

Pratter, M.  , January 2006. Chest

 

 

Reviewed by Louise Chang on August 06, 2018

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What else can cause postnasal drip?

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