Allergens, also called antigens, are substances that can trigger an allergic reaction. Having allergies means that the body reacts to allergens as a harmful foreign substance.
Allergens may be:
Allergy symptoms may be controlled by avoiding exposure to allergens. Some people need medicines or allergy shots (immunotherapy) to control their body's reactions to the allergens.
Last Revised: June 17, 2013
Author: Healthwise Staff
Medical Review: E. Gregory Thompson, MD - Internal Medicine & Rohit K Katial, MD - Allergy and Immunology
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.