The Total IgE test is a blood test used to measure the levels of Immunoglobulin E (IgE) in the body. IgE is an antibody produced by the immune system in response to allergens such as pollen, pet dander, or certain foods. Elevated levels of Total IgE can indicate the presence of an allergic reaction or an underlying condition such as asthma or atopic dermatitis. However, it is important to note that a high level of Total IgE does not necessarily indicate a specific allergy or disease. The Total IgE test can be helpful in diagnosing allergies or monitoring treatment, but it should be interpreted in conjunction with other clinical findings and tests.