A post-viral cough is a lingering cough that follows a viral respiratory tract infection, such as a common cold or flu and lasting up to eight weeks. Post-viral cough is a clinically recognized condition represented within the European medical literature. Patients usually experience repeated episodes of post-viral cough. The heightened sensitivity in the respiratory tract is demonstrated by inhalation cough challenge.
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Cause
One possible cause for post-viral cough is that the receptors that are responsible for stimulating the cough during the respiratory tract infection are up-regulated by respiratory tract infection and continue to stimulate even after the virus has disappeared.
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Treatment
Post-viral cough can be resistant to treatment. Post-viral cough usually goes away on its own; however, cough suppressants containing codeine may be prescribed. A study has claimed theobromine in dark chocolate is more effective.
Source of the article : Wikipedia
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