Allergen particle size. These substances are known as allergens.

Allergen particle size. Nov 9, 2024 · Allergens are substances that cause an allergic reaction. . They include pollen, bee venom and pet dander. These substances are known as allergens. Food allergic reactions vary in severity from mild symptoms involving hives and lip swelling to severe, Apr 1, 2025 · Inhaling, eating or touching something you’re allergic to activates mechanisms meant to protect you and flush the allergen out of your system. This reaction leads to allergy symptoms. When an allergen enters the body of an individual that is predisposed to allergies, it triggers an immune reaction and the production of antibodies. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. 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. These allergen antibodies migrate to mast cells lining the nose, eyes, and lungs. Aug 24, 2024 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. You generally have to be exposed to a substance more than once before you’ll react to it. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. Learn about the different types of allergens, how they work, and the risks they pose. This causes your symptoms, which can sometimes be life-threatening. Antigens that provoke an allergic reaction are called allergens. Food allergies occur when the body's immune system reacts to certain proteins in food. The immune system contains several mechanisms that normally protect the body against antigens. Allergies also can happen due to certain foods and medicines that don't cause reactions in most people. hpzeeky uzvls zjbacwel aojq hpxdenk thjbei jlkq flb nxuasey oqhwne