When an allergen enters the body of an individual that is predisposed to allergies, it triggers an immune reaction and the production of antibodies. These allergen antibodies migrate to mast cells lining the …

Oct 15, 2025 · Key Takeaways Allergens are substances that cause the body to produce an allergic reaction. Common allergy symptoms include a runny nose, congestion, cough, and sneezing. Allergy …

This website is the official site for the systematic allergen nomenclature that is approved by the World Health Organization and International Union of Immunological Societies (WHO/IUIS) Allergen …

Inhaling, eating or touching something you’re allergic to activates mechanisms meant to protect you and flush the allergen out of your system. This causes your symptoms, which can sometimes be life …

Jan 1, 2025 · As a result, the immune system reacts by making a type of antibody called immunoglobulin E (IgE) to defend against the allergen. This reaction leads to allergy symptoms.

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 and pet …

Allergens may be naturally occurring or of synthetic origin and include pollen, mold spores, dust, lint, animal dander, insect debris, foods, blood serum, and drugs.

Sep 22, 2025 · 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,...

Jun 5, 2025 · How a person reacts to an allergen depends on how they come in contact with it. In many people, allergic reactions occur on the skin and in the airways and mucous membranes.

2 days ago · Plus, a surge of allergy and asthma triggers that can turn the season stressful for some folks. But with a little planning, you can enjoy the celebrations without spending them sniffing, itchy or …