IgE

IgE is an antibody produced by your immune system in response to allergens and parasitic infections. Total IgE testing measures the overall amount of this antibody in your blood. Elevated total IgE can indicate allergies, asthma, eczema, or parasitic infection. However, IgE alone doesn't identify specific allergens—it simply reflects your immune system's allergic response level. This test helps determine if allergic disease is present and can guide further allergen-specific testing. It's useful for screening people with unexplained itching, hives, respiratory symptoms, or gastrointestinal complaints.