asthma trigger is a factor that can lead to sudden
difficulty breathing or other symptoms of asthma (asthma attack).
Some triggers are substances a person may be allergic to (allergens). Allergens cause the body's natural
defenses (immune system) to produce chemicals called
immunoglobulin E (IgE) antibodies. These chemicals bind to allergens, causing
inflammation of the bronchial tubes, which carry air
to the lungs. The allergen may also cause asthma attacks. These triggers
Global Initiative for Asthma (GINA) (2014). Global Strategy for Asthma Management and Prevention. http://www.ginasthma.org/documents/4. Accessed May 21, 2014.
Guarnieri M, Balmes JR (2014). Outdoor air pollution and asthma. Lancet, 383(9928): 1581-1592. DOI 10.1016/S0140-6736(14)60617-6. Accessed May 6, 2014.
ByHealthwise Staff Primary Medical ReviewerJohn Pope, MD - Pediatrics E. Gregory Thompson, MD - Internal Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerMary F. McNaughton Collins, MD, MPH - Internal Medicine