What is allergy and IgE levels?

Allergy is a hypersensitivity reaction of the immune system to substances known as allergens, which are typically harmless to most people. When exposed to allergens, individuals with allergies may experience a range of symptoms, including sneezing, itching, hives, nasal congestion, or even severe reactions such as anaphylaxis. IgE (immunoglobulin E) levels are antibodies produced by the immune system in response to allergens. Elevated IgE levels in the blood are often associated with allergic conditions, as IgE plays a crucial role in allergic reactions by triggering the release of inflammatory substances. Measuring IgE levels helps in diagnosing allergies and determining the severity of the immune response to allergens.