Evidence check: IgE Allergietest in the context of Haut

An IgE allergy test measures specific immunoglobulin E antibodies to allergens and is clinically used to diagnose type I allergies (e.g., hay fever, food allergies). In the skin context, it can be relevant for suspected atopic dermatitis or urticaria, but the link between IgE levels and skin symptoms is not always clear. Many skin reactions are non-IgE-mediated (e.g., irritant contact dermatitis). Home tests (e.g., MyBody-X) typically offer a limited allergen panel and lack clinical interpretation. False positives and negatives are possible. Evidence for self-administered IgE tests in skin allergy diagnosis is weak; professional evaluation with standardized methods (skin prick test, lab-based specific IgE) remains the gold standard. Caveat: Without history and clinical correlation, an IgE test alone cannot diagnose skin conditions.