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Tobacco Smoke - Irritant
Tobacco smoke is a powerful asthma trigger, whether you are the one doing the smoking or if you are just breathing in secondhand smoke from someone else's cigarette, cigar or pipe.

Airborne Asthma Triggers
Airborne asthma triggers are inhaled particles of dust, powders and so on that further irritate already inflamed asthma airways. They are sometimes known as irritants.

Air Pollution as an Asthma Trigger
Air pollution is yet another asthma trigger. Air pollutants such as smoke, ground level ozone, vehicle exhaust, and others are known as irritants.

Chemical Asthma Triggers & Irritants
Chemical asthma triggers occur when someone with already inflamed airways from asthma is exposed to a chemical irritant that further irritates the airways.

Insect Allergens: Indoor Asthma Trigger
Insect allergens are an indoor asthma trigger. Cockroaches are the most common type of insect allergen, but stinging insects such as bees and fire ants can also trigger asthma symptoms in some cases.

Animal Dander Is An Asthma Trigger
Animal dander is an asthma trigger for many people. Animal dander is the dead skin flakes that come off furry and feathered animals. It can trigger asthma symptoms.

Dust Mites & Asthma
Dust mites and asthma is not a good combination. Dust is a potent asthma trigger in sensitive people. Find out more about dust and how to avoid having it set off your asthma symptoms.

Mold: Asthma Trigger x 2
Mold is both an indoor asthma trigger and an outdoor asthma trigger. Mold is also an allergen for people who have allergic asthma and can trigger asthma symptoms.

Pollen: A Potent Seasonal Allergen & Asthma Trigger
Pollen is an airborne allergen known to trigger asthma and nasal allergies. This means that asthma symptoms may worsen when people who are also sensitive to pollen come in contact with it.

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