Your doctor will ask about your symptoms and medical history. A physical exam will be done. Chickenpox is usually diagnosed based on the rash. Blood and laboratory tests to identify the varicella zoster virus (VZV) are available for use in questionable cases, but they are rarely necessary.
Blood and laboratory tests
—several tests are available that may help confirm the diagnosis of chickenpox, including:
Skin smear to infer the presence of chickenpox virus by stainingSkin smear to detect chickenpox viral proteins using immunofluorescenceBlood test to detect the presence and measure the amounts of antibodies to chickenpox virusViral culture
Chickenpox (varicella). Centers for Disease Control and Prevention website. Available at:
Updated April 25, 2013. Accessed May 30, 2013.
Long S, Pickering L, Prober C.
Principles and Practice of Pediatric Infectious Diseases
3rd ed. New York, NY: Churchill Livingstone; 2008.
Last reviewed May 2014 by David Horn, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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