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Triggers Indoors

Environmental tobacco smoke (secondhand smoke) can trigger asthma.

Some of the most common indoor asthma triggers include environmental tobacco smoke (secondhand smoke), dust mites, mold, cockroaches and other pests, and household pets. Visit these Web sites to learn about asthma triggers and how to reduce your exposure to them.

American Lung Association

Learn about asthma and how you can control asthma triggers.

CDC’s National Center for Environmental Health

Our people at the National Center for Environmental Health are working to prevent illness, disability, and death from interactions between people and the environment.

  • Air Pollution and Respiratory Health—Indoor Air Pollution

    This site provides information and frequently asked questions from federal, state, and private resources about asthma and indoor and outdoor air pollution.

  • Mold

    People with asthma may be more sensitive to mold. Mold can bring on symptoms of asthma or cause an asthma attack. This site provides basic facts about different kinds of mold and how to get rid of them.

CDC’s National Institute for Occupational Safety and Health

Learn about work-related asthma and how to prevent asthma symptoms.

U.S. Environmental Protection Agency

This federal agency informs people about the environment and develops and enforces regulations about the environment. Here you’ll find information about how you can control asthma triggers at home:

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Data & Surveillance

Percents by Age, Sex, and Race, United States, 2012. Age: Child = 9.3%, Adult =  8.0%, Sex: Male = 7.0%, Female =  9.5%, Race/Ethnicity: White =  8.1%, Black =  11.9%, Hispanic =  7%. Source: National Health Interview Survey, National Center for Health Statistics, Centers for Disease Control and Prevention.


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  • Page last reviewed: April 24, 2009
  • Page last updated: April 27, 2009 The U.S. Government's Official Web PortalDepartment of Health and Human Services
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