Merck Manual

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Common Asthma Triggers

Common Asthma Triggers

Triggers

Examples

Allergens

Dust or house mites, molds, pollen, animal dander, cockroach feces, pets, and feathers

Exercise

Particularly exercise in cold or dry air

Irritants

Firsthand and secondhand tobacco smoke, perfumes, wood smoke, cleaning products, scented candles, air pollution, strong odors, and irritating fumes

Viral respiratory infections*

Other

Emotions (such as anxiety, anger, and excitement)

Aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs)

* Viral infections are the most common triggers in children.