Asthma is a chronic lung disease characterized by inflamed, swollen and narrowed airways, making breathing difficult. Although no cure has been found for asthma, it can be controlled.

If you are asthmatic, you have sensitive airways that react to certain factors such as stress, infection (flu, common colds), dust, mites, feathers, cigarette smoke, and changes in the weather. THese can trigger the selling and the narrowing of your airways.