I may be wrong but I don’t believe they do. When I got checked for allergies they literally just spread a small amount of various common allergens in specific spots on my back and waited to see which spots got red and itchy. There were no blood tests involved.
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An allergy blood test measures a substance called immunoglobulin E (IgE) in your
blood. IgE is an antibody that your body makes. If you have allergies,
you may have more IgE in your blood than normal.
Anonymous 0
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Symptoms of allergies are caused by white blood cells, so they basically look for an increase in those
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