An 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, causinginflammationof the bronchial tubes, which carry air to the lungs. The allergen may also cause asthma attacks. These triggers include:
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, MPH - Pediatrics E. Gregory Thompson, MD - Internal Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerMary F. McNaughton-Collins, MD, MPH - Internal Medicine