While it can sometimes be difficult to pinpoint the problem that's triggering a chronic cough, the most common causes are 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...consult physician they will help you

Hello asthma Bronchitis should be ruled out antibiotics and bronchodilators should be used if required do salt water gargling consult physician for further evaluation and treatment.