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 · When you develop an allergic reaction to a substance, your body treats that substance (allergen) as a threat. Your body then produces an immune response against the allergen.

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.

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.

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 …

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 causes your symptoms, which can …

Jul 7, 2025 · Common allergy symptoms include skin reactions, respiratory issues, and digestive problems, and can be managed through avoidance, medication, immunotherapy, and natural …

Sep 10, 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.

Allergens are substances that trigger allergy symptoms. Many types of things can be an allergen. Allergens that affect one person may not affect other people.

Jun 12, 2025 · The substance it reacts to is known as an allergen. When an allergic reaction occurs, allergens bind to antibodies that the body produces called immunoglobin E (IgE).