An allergic reaction happens when your body thinks a foreign substance is a threat. Allergens can enter the body by breathing, swallowing, or touch. After exposure to an allergen, your immune … From allergies.net
NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES
Apr 22, 2025 Allergies arise if the body's immune system overreacts to certain foreign substances (allergens) that are normally harmless in most people. Common allergens include … From niehs.nih.gov
Mostly, the part of the body the allergen touches determines what symptoms you develop. For example: Allergens that you breathe in often cause a stuffy nose, itchy nose and throat, … From pennmedicine.org
An allergen is a substance that can cause an allergic reaction. In some people, the immune system recognizes allergens as foreign or dangerous. As a result, the immune system reacts … From medlineplus.gov
Allergies are your immune system’s overreaction to foreign substances. When you touch, inhale or eat something you’re allergic to, your body thinks it’s harmful and reacts to try to get rid of it. … From my.clevelandclinic.org
ALLERGEN | DESCRIPTION, TYPES, & IMMUNE RESPONSE | BRITANNICA
Allergen, substance that in some persons induces the hypersensitive state of allergy and stimulates the formation of reaginic antibodies. Allergens may be naturally occurring or of … From britannica.com
Aug 24, 2024 Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom … From mayoclinic.org
FOOD ALLERGIES | FDA - U.S. FOOD AND DRUG ADMINISTRATION
Food allergies occur when the body's immune system reacts to certain proteins in food. Food allergic reactions vary in severity from mild symptoms involving hives and lip swelling to severe,... From fda.gov
ALLERGENS: TYPES, FUNCTION, RISKS - VERYWELL HEALTH
Nov 9, 2024 Allergic reactions are symptoms that result from your body creating these antibodies. Allergens can be airborne or can arise from contact with your skin, from … From verywellhealth.com
An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response. In technical terms, an allergen is an antigen … From en.wikipedia.org
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