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Why is asthma found more commonly in the western world? What causes asthma?  Why do some people develop asthma while others don’t?

Asthma is a chronic lung condition that is characterized by difficulty in breathing. People with asthma have extra sensitive and/or hyper-responsive airways. During an asthma attack, their airways become irritated for one of several reasons, and react by narrowing and constricting.  This causes increased resistance to airflow, and obstructs the flow of the air passages to and from the lungs.  It becomes hard to breathe. Read more . . .