Simply defined, asthma is a medical condition which affects the airways in some people. These airways are tubes which help us transport oxygen into and out of the lungs.
Breathlessness and wheezing are a couple of the symptoms of asthma. These symptoms differ in severity from person to person. Some people may suffer symptoms several times a week, or in worse cases several times a day. Asthma can be at its worst during physical activity, when it's cold, or at night. An asthma attack is caused when the lining of the bronchial tubes swells up. This then causes the airways to narrow which results in a reduction of air flow into and out of the lungs. Recurrent asthma symptoms...

