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What is Asthma?

Asthma is a chronic disease that is characterized by the following three events, each of which make breathing difficult:

·         inflammation or swelling of the lining of the airways

·         production of excess mucous in the bronchioles

·         involuntary tightening of the muscles around the airways.

In Asthma, the airways become hyper-reactive. 

Exposure to irritants like pollen, dust, cigarette smoke or very cold air can make breathing difficult, because of excess tightening and narrowing of the airways.

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