Post-nasal drip

Excessive mucus production by the nasal mucosa resulting in accumulation and drainage of mucus into the posterior nasopharynx and throat, causing a sensation of drainage, throat clearing, coughing, or a tickling sensation.

Causes

• Allergic causes

  • Allergic rhinitis

  • Pollen allergy

  • Dust mite allergy

  • Pet dander allergy

  • Mold allergy

• Infectious causes

  • Acute sinusitis

  • Chronic rhinosinusitis

  • Common cold

  • Influenza

• Environmental and irritant causes

  • Dry air

  • Tobacco smoke

  • Air pollution

  • Chemical irritants

  • Occupational exposures

• Acid reflux

  • Gastroesophageal reflux disease (GERD)

  • Laryngopharyngeal reflux

• Medications causing nasal mucosal changes or increased mucus production

  • Antihypertensive medications

  • Oral contraceptives

• Structural abnormalities causing impaired mucus drainage

  • Deviated nasal septum

  • Nasal polyps

• Vasomotor rhinitis