What is asthma? Find medical information on the symptoms, causes and treatment of asthma and learn more about asthma in this category overview.

What is asthma?

Asthma is a respiratory condition that causes the airways in the body to constrict, limiting the amount of air coming in and out of the lungs.

How severe is your asthma?

Asthma severity is assessed to decide which treatment is suitable. Grade one is the mildest grade (known as mild intermittent asthma) and grade four the most severe.

How is asthma diagnosed?

If you regularly have breathing problems, your doctor should investigate whether or not you may be suffering from asthma.

How is asthma treated?

Because asthma is two conditions rolled into one, inflammation and bronchoconstriction of the airways, the most effective treatment consists of a two-pronged approach, treating both factors simultaneously.

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Asthma Expert

Professor Keertan Dheda has received of several prestigious awards including the 2014 Oppenheimer Award, and has published over 160 peer-reviewed papers and holds 3 patents related to new TB diagnostic or infection control technologies. He serves on the editorial board of the journals PLoS One, the International Journal of Tuberculosis and Lung Disease, American Journal of Respiratory and Critical Medicine, Lancet Respiratory Diseases and Nature Scientific Reports, amongst others.Read his full biography at the University of Cape Town Lung Institute

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