Mississippi State Department of Health

Outdoor Triggers


Things that cause asthma episodes are known as triggers. Many asthma triggers are found outdoors.

Air pollution

Air pollution can trigger asthma. Even healthy people can have trouble breathing on high air pollution days. The main air pollution triggers are small particles (also known as particulate matter) and ground level ozone. These triggers come from:


Cold air, humid air, and changes in the weather can trigger asthma.


Not all people with asthma have allergies, but for those who do, outdoor allergens may trigger asthma. Common outdoor allergens that trigger asthma episodes include:

What can you do?

Learn More

Links referenced
www.airnow.gov    http://www.airnow.gov/
About Asthma    http://msdh.ms.gov/msdhsite/index.cfm/43,7183,235,425,html
Indoor Triggers    http://msdh.ms.gov/msdhsite/index.cfm/43,7182,235,425,html
Parents    http://msdh.ms.gov/msdhsite/index.cfm/43,7180,235,425,html
Action Plan    http://msdh.ms.gov/msdhsite/index.cfm/43,7178,235,425,html
Asthma Resources    http://msdh.ms.gov/msdhsite/index.cfm/43,0,235,html

Find this page at http://msdh.ms.gov/msdhsite/index.cfm/index.cfm

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