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 that is capable of …

Oct 15, 2025 · Allergens are substances that cause an allergic reaction. Learn about the different types of allergens, how they work, and the risks they pose.

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 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.

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 …

An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. For instance, if you have an allergy to pollen, your immune …

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

Allergen immunotherapy, also known as allergy shots, helps build your tolerance to allergens, reducing or eliminating symptoms. It works by the patient being given a gradually increasing amount of the …