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What causes an asthma attack?

If you have asthma, your inflamed airways are “twitchy” -- they overreact to irritants in your environment. These irritants are called triggers, and they include anything that sets off (triggers) an asthma flare-up.

Different people have different triggers. Some common asthma triggers are allergies, chest colds, pollution, and exercise. To control your asthma, you have to find out what your triggers are -- and learn how to deal with them.
An asthma attack happens when a trigger, such as exercise, cold air, allergens or other irritants, causes the airway to swell and narrow. This makes breathing difficult. 

Continue Learning about Asthma Causes

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.