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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.
Best Answer: Chronic cough is a cough that does not resolve (go away). Chronic cough is not a disease in itself; rather it is a symptom of other disorders. It is a common problem and the reason for many doctor visits. Some common causes of chronic cough include asthma, allergic rhinitis, sinus problems (for example sinus infection), and esophageal reflux of stomach contents.