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Children who have asthma tend to have an overly sensitive immune system, causing airways in their lungs to become inflamed and swollen when they are exposed to things like smoke or allergens. When this occurs–and the airways become swollen–the lungs fill with thick mucus, and this leads to the asthma symptoms. Children who have asthma have inflamed air passages. Leukotriene antagonists help because they open up the airways by reducing the swelling. Childhood asthma is a disease that can lead to death if left untreated. However, it can be difficult to recognize asthma symptoms in children.

Childhood asthma is now a major health problem in Australia with 31% of West Australian children having been diagnosed with the condition. Chronic inflammation of the airways is also a major problem with 12% of the population reporting wheeze severe enough to disturb sleep. Children also spent much more time outside playing in the dirt and getting dirty. These days, they spend their time on the computer. There are some asthma symptoms in children you need to be aware of.