What is serum IgE? My value is about 270.9 is it very bad? Will I have to take medicine? Although I am suffering from eye allergy?

Question

An immunoglobulin E (IgE) test measures the blood level of IgE, one of the five subclasses of antibodies. Antibodies are proteins made by the immune system that attack antigens, such as bacteria, viruses, and allergens. IgE antibodies are found in the lungs, skin, and mucous membranes. An allergen-specific immunoglobulin E (IgE) blood test is done to check whether a person is allergic to a particular substance. An allergic reaction occurs when the immune system overreacts to something, often in the environment, that's harmless to most people. Variations in the upper limit of normal total serum IgE have been reported: they can range from 150 to 1,000 UI/ml; but the usually accepted upper limit is between 150 and 300 UI/ml.

Sajeev Kumar · Accepted Answer

An immunoglobulin E (IgE) test measures the blood level of IgE, one of the five subclasses of antibodies. Antibodies are proteins made by the immune system that attack antigens, such as bacteria, viruses, and allergens. IgE antibodies are found in the lungs, skin, and mucous membranes. An allergen-specific immunoglobulin E (IgE) blood test is done to check whether a person is allergic to a particular substance. An allergic reaction occurs when the immune system overreacts to something, often in the environment, that's harmless to most people. Variations in the upper limit of normal total serum IgE have been reported: they can range from 150 to 1,000 UI/ml; but the usually accepted upper limit is between 150 and 300 UI/ml.