Cold sores have very recognizable features. They are most often diagnosed by physical exam and by your medical history. If your doctor is not sure, a sample of the fluid or tissue from the blister may be taken. A blood sample may also be taken for testing.
Testing may include any of the following:
Cold sores. Nemours Kids Health website. Available at: http://kidshealth.org/parent/infections/common/cold_sores.html. Updated February 2014. Accessed February 17, 2014.
Herpes simplex. American Academy of Dermatology website. Available at: https://www.aad.org/public/diseases/contagious-skin-diseases/herpes-simplex. Accessed February 14, 2014.
Oral herpes. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T115104/Oral-herpes. Updated October 5, 2015. Accessed October 4, 2016.
Last reviewed February 2016 by David L. 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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