MSD Manual

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Common Asthma Triggers

Common Asthma Triggers

Triggers

Examples

Allergens

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

Exercise

Particularly exercise in cold or dry air

Irritants

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

Viral respiratory infections*

Respiratory syncytial virus, rhinovirus, parainfluenza virus infection

Other

Emotions (such as anxiety, anger, and excitement), aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs), and gastroesophageal reflux

* Viral infections are the most common triggers in children.