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For adults, the most common causes of chronic cough are asthma, gastroesophageal reflux disease (GERD), and upper airway cough syndrome (related to postnasal drip), according to background information in Marchant's study.
Causes of Coughs. Acute coughs can be divided into infectious (caused by an infection) and noninfectious causes. 1  Infectious causes of acute cough include viral upper respiratory infections (the common cold), sinus infections, acute bronchitis, pneumonia, and whooping cough. Within the lungs both common and uncommon conditions cause chronic cough. 2  Common causes include asthma, emphysema, and chronic bronchitis. 3  Less common causes of lung-induced chronic cough include cancer, sarcoidosis, diseases of the lung tissue, and congestive heart failure with chronic fluid build-up in the lungs.