Postnasal drip syndrome is one of the most common causes of chronic cough, and is caused by a variety of conditions in-cluding vasomotor rhinitis, allergic rhinitis, nasal polyps and chronic sinusitis. Postnasal drip syndrome is diagnosed based on clinical symptoms, and patients may complain of tickles or drainage of liquid in the back of the throat. Cobblestoning of the nasal or oropharyngeal mucosa may be observed upon physical examination. However, in many patients cough may be the only symptom of postnasal drip syndrome. Confirmation of the diagnosis may depend on the resolution of symptoms after treat-ments with antihistamines and intranasal or systemic corticosteroids.