Asthma is a chronic lung problem that is characterized by difficulty in breathing. Persons with asthma have extra sensitive or hyper-responsive airways. During an asthma attack, the airways become irritated and react by narrowing and constricting, which cause increased resistance to airflow, and obstructing the flow of the air passages to and from the lungs.
The first step in keeping asthma under control is diagnosis. Read more . . .