Safety and Wellness

Definition: Allergen



An allergen is a medical word for anything that causes an allergic reaction. Allergens can be many different things, including grass, dust mites, or animal dander - the stuff that flakes off dogs' and cats' skin.

Kids Health

Note: All information is for educational purposes only. For specific medical advice, diagnoses and treatment, consult your doctor.

© 1995–2015 The Nemours Foundation/KidsHealth. All rights reserved.