Chronic cough is a cough that lasts eight weeks or more for adults and four weeks or more for children. It can be dry or productive, occur in the daytime, nighttime or both.
Chronic cough can be caused by a variety of health problems. Allergies and asthma are common causes of a cough. Uncontrolled acid reflux, a deviated septum,and obstructive sleep apnea can also cause chronic cough.