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, causing inflammation of the bronchial tubes, which carry air to the lungs. The allergen may also cause asthma attacks. These triggers include:
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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