Allergen - Wikipedia 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 stimulating a type-I hypersensitivity reaction in atopic individuals through immunoglobulin E (IgE) responses [ 1 ]
Allergens: Types, Function, Risks - Verywell Health 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 medications, or from food Depending on the type, they may enter your body through your respiratory system, skin, or digestive tract
Allergies - Symptoms and causes - Mayo Clinic 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 dander Allergies also can happen due to certain foods and medicines that don't cause reactions in most people
Allergen: MedlinePlus Medical Encyclopedia 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 by making a type of antibody called immunoglobulin E (IgE) to defend against the allergen This reaction leads to allergy symptoms
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 synthetic origin and include pollen, mold spores, dust, lint, animal dander, insect debris, foods, blood serum, and
Allergies: Types, Symptoms, Treatment Management - Cleveland Clinic 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 This can cause minor reactions like itching, sniffling and sneezing
Allergy Symptoms: Signs, Symptoms, and Treatment - WebMD Allergies are when your immune system overreacts to something called an allergen An allergen is a foreign substance that's not harmful to most people, such as pollen or pet dander (skin
National Institute of Environmental Health Sciences Allergies arise if the body's immune system overreacts to certain foreign substances (allergens) that are normally harmless in most people Common allergens include pollens, fungal spores, house-dust mites, and animal epithelial materials but can also include drugs, biologic products, and insect venoms
Allergies - Penn Medicine 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, mucus, cough, and wheezing ; Allergens that touch the eyes may cause itchy, watery, red, swollen eyes ; Allergens that touch the skin can cause a skin rash, hives, itching, blisters, or skin peeling
Allergies Overview: Symptoms, Treatments, and More - Healthline An allergy is an immune system response to a foreign substance, or allergen, that’s not typically harmful to the body Symptoms and treatments may vary depending on the type of allergy you have