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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*
In young children: Respiratory syncytial virus Respiratory Syncytial Virus (RSV) Infection and Human Metapneumovirus Infection Respiratory syncytial virus infection and human metapneumovirus infection cause upper and sometimes lower respiratory tract infections. Respiratory syncytial virus is a very common cause of... read more , rhinovirus Common Cold The common cold is a viral infection of the lining of the nose, sinuses, and throat. Many different viruses cause colds. Usually, colds are spread when a person's hands come in contact with... read more , parainfluenza virus infection
In older children: Upper respiratory infections (particularly with rhinovirus) and pneumonia Overview of Pneumonia Pneumonia is an infection of the small air sacs of the lungs (alveoli) and the tissues around them. Pneumonia is one of the most common causes of death worldwide. The most common symptom of... read more
Other
Emotions (such as anxiety, anger, and excitement)
Aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs)
Gastroesophageal reflux Gastroesophageal Reflux in Children Gastroesophageal reflux is the backward movement of food and acid from the stomach into the esophagus and sometimes into the mouth. Reflux may be caused by the infant’s position during feeding... read more
* Viral infections are the most common triggers in children.