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. |