An easy way to find out would be to have the doctor culture one of the vesicles when they are active. The doctor would unroof one of the blisters and take a sample of the liquid or puss inside.
I have had quite a few patients over the years have herpes viruses on their legs as strange as this may sound.
Other clues to confirm this diagnosis would be if your husband experiences any signs of the rash coming before it actually breaks out such as a tingling in his legs or an itching in his legs. Similar to the feeling one would have before a cold sore on the lip comes out. Also he would experience an itching or burning pain with the rash.
Blood work would not be helpful in determining if this is a herpes virus. He needs culture of the vesicles.
If it is herpes virus there are medications such as valtrex that he could take the minute he feels the rash is going to come out and this would prevent an outbreak from even occuring.
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Sincerely, Jennifer. I hope my answer helped you. If it did please be sure to give me a good rating. If it did not please contact me as I would be happy to help you further.
