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Have you undergone HSV1 & HSV 2 IgG also?
History of unprotected sex?
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In my opinion you should ask your doctor for following blood test.
Herpes Simplex Virus, Type 1/2 DNA, Real-Time PCR
If PCR test is also Negative herpes should not be considered as a diagnosis and it may be treated as a skin irritation or fungal infection.
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The culture often fails to find the virus even when it is present.
A PCR is a more advanced test since it detects the DNA of the virus.
ELISA antibody test may not be 100% accurate and may show false Negative results.
This don't look like HPV.
Probably a Negative PCR test will rule out herpes.
Also AEC or IgE test may be done to rule out allergy.
With a Negative PCR test Herpes is ruled out.
I do think this is a skin irritation or allergy only.
PCR has been shown to be 1.5 to 4 times more sensitive than viral culture in detecting HSV infection.So in my opinion you don't have herpes.
A PCR test can be done on cells or fluid from a sore or on blood.