is a long-term (chronic) lung disease that inflames and narrows the airways. The airways are tubes (bronchial) that carry air in and out of the lungs. For people with asthma, the airways are sensitive and react to various substances. If they react, the airways become inflamed and narrow, so less air reaches the lungs.
Around 200 to 250 million people are affected worldwide and nearly 250,000 people die per year from asthma. In Asia the rate of asthma is lower when compared to the United States. Asthma is more common in developed countries than developing countries.
Asthma affects people of all ages, but it most often starts during childhood. Young children who often wheeze and have respiratory infections are at highest risk of developing asthma that continues beyond 6 years of age.
Are you at risk of developing asthma: http://www.patientsengage.com/conditions/asthma/causes-risk-factors
Can it be prevented? http://www.patientsengage.com/conditions/asthma/prevention
Symptoms: http://www.patientsengage.com/conditions/asthma/signs-symptoms
What triggers an asthma attack : http://www.patientsengage.com/conditions/asthma/causes-risk-factors
Types of asthma and Complications: http://www.patientsengage.com/conditions/asthma/types-stages
What tests do you need to have done: http://www.patientsengage.com/conditions/asthma/diagnosis-tests
Treatment of Asthma: http://www.patientsengage.com/conditions/asthma/treatments
Managing Asthma: http://www.patientsengage.com/conditions/asthma/management