How are you? Chronic cough is typically defined as a cough that persists for
longer than 8 weeks
. This is usually a symptom and not a disease. This could be due to post nasal drip which is mucus accumulation in the back of the nose and throat, excessive or thick secretions, or impairment in the normal clearance of mucus from the nose and throat. Try to avoid the nasal irritants such as cigarette smoke, perfume, aerosol sprays, smoke, smog and car exhaust.