IgE stands for Immunoglobulin E, which is a type of antibody that is produced by the immune system in response to allergens. IgE antibodies are responsible for triggering allergic reactions, such as hay fever, asthma, and food allergies. When an allergen enters the body, IgE attaches to mast cells and basophils, triggering the release of chemicals such as histamine, which causes symptoms like swelling, itching, and inflammation.
