Chronic cough is defined as lasting eight weeks or longer in adults, four weeks in children While it can sometimes be difficult to pinpoint the problem that's triggering a chronic cough, the most common causes are tobacco use, postnasal drip, asthma and acid reflux the backflow of stomach acid that can irritate your throat. Chronic cough typically disappears once the underlying problem is treated...It may be due to acid reflux...try eating several small meals instead of three large ones whenever you can...Avoid foods that irritate your stomach, especially those that are spicy, acidic, fried or fatty... avoid coffee,tea etc... Avoid stress,consider calming activities, such as meditation, yoga etc...sleep with head raised position and have dinner at least 2 hours before sleep..do regular exercises...take esmoprezole 20 mg twice daily before food... If no improvements consult nearest physician.