Asthma is a recurring (chronic) condition that restricts the movement of air in and out of your lungs. Things that irritate the airways and cause them to narrow, including pollen, smoke, and dust, are known triggers. These can lead to an asthma attack, which causes symptoms such as wheezing and difficulty breathing. If you have been diagnosed with asthma, your healthcare provider can give you information on an appropriate treatment plan and how to avoid potential triggers.
(Click Asthma for more information. This article explains in more detail what causes this condition, the usual course of treatment, and interesting statistics.)