By Harrison Cavanaugh
What Is Asthma
Asthma is a lung disease that is caused by chronic inflammation of the airways. It is one of the most common diseases of children. Asthma is most common in children but, adults can have asthma, too. Asthma attacks occur when lung airways become swollen and tighten due to airway inflammation. Asthma attacks can be caused by airway infection, allergy particles, chemical irritants, and air pollution.