ASTHMA - WHAT IS IT?
Asthma is a condition that affects the airways – the large and small tubes that carry air in and out of the lungs.
When a person with asthma comes into contact with something that irritates their airways (this is called ‘an asthma trigger’), the muscles around the walls of the airways tighten so that the airways become narrower and the lining of the airways becomes inflamed and starts to swell. Sometimes sticky mucus or phlegm builds up which can further narrow the airways.
All these reactions cause the airways to become narrower and irritated - making it difficult to breath and leading to symptoms of asthma.