First Time User? Enroll now.
Appointments - We are seeing patients. Get full details.
Visitors - As the COVID-19 situation has evolved, our policy is evolving as well. Get full details.
Home > Fitness & Health > Health Library > Allergen
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. Medicines and immunotherapy may help relieve symptoms or reduce the body's reactions to certain allergens.
Current as of: February 10, 2021
Author: Healthwise Staff
Medical Review:E. Gregory Thompson MD - Internal Medicine & Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine & Rohit K Katial MD - Allergy and Immunology & Lesley Ryan MD - Family Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.