COUGH-VARIANT ASTHMA

A chronic cough is one that lasts longer than six to eight weeks. Cough-variant asthma (CVA) is one of the most common causes of chronic cough. CVA occurs when the main symptom is a dry, unproductive cough (one which does not expel mucus from the respiratory tract). This type of asthma is usually absent from typical asthma symptoms like wheezing and trouble breathing. However, the coughing may increase during exercise and exposure to cold air, environmental pollutants, and other typical asthma triggers. CVA is a risk factor for a person to develop regular asthma, so it is important to control and treat this condition, which is usually done through asthma medications and by avoiding typical asthma triggers.

P.S. Cough-variant asthma can be difficult to diagnose because its only symptom (a dry cough) is the main symptom in many other respiratory and bronchial conditions.  

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