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How are skin and blood tests for allergies different?

Paul M. Ehrlich, MD
Allergy & Immunology
Science shows us that skin tests and blood tests for allergies don't really measure the same things. The antibodies that register in a blood test have a half-life of two days. They come and go without putting your immune system on a state of red alert. The ones that react in the skin have a half-life of six to eight weeks, which means that your body is ready to strike for a protracted period.
Asthma Allergies Children: A Parent's Guide

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Asthma Allergies Children: A Parent's Guide

Asthma and allergies are at epidemic proportions. It doesn't have to be that way. Two experienced pediatric allergists tell everything a conscientious parent needs to know about these conditions,...

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.