Causes of a Cough
Most people with a cough have a respiratory tract infection caused by a virus, such as the common cold, flu or bronchitis but there are other reasons for a cough.
Smoke, dust and the drying effect of air conditioning can all irritate the airways enough to bring on a cough, as can an allergic condition known as rhinitis or a medicine that has been prescribed (for example medicines known as ACE-inhibitors which are used to treat high blood pressure or cardiovascular disease).
In children, a persistent cough may indicate a more serious respiratory tract infection such as whooping cough.
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