English: What is asthma? Asthma is characterized by chronic inflammation and asthma exacerbations, where an environmental trigger initiates inflammation, which makes it difficult to breathe. This video covers the pathophysiology of asthma, signs and symptoms, types, and treatment.

Sources: http://www.nhlbi.nih.gov/health/health-topics/topics/asthma http://www.uptodate.com/contents/diagnosis-of-asthma-in-adolescents-and-adults http://www.uptodate.com/contents/virus-induced-wheezing-and-asthma-an-overview http://www.uptodate.com/contents/acute-asthma-exacerbations-in-children-home-office-management-and-severity-assessment http://www.uptodate.com/contents/acute-asthma-exacerbations-in-children-emergency-department-management http://www.uptodate.com/contents/natural-history-of-asthma

http://www.uptodate.com/contents/an-overview-of-asthma-management