Hello,I think u r so much in tension about this lesion.According to ur h/o lesion most probably they r shingles
. Many time new vesicular lesion can be reappear in the healing stage of herpes zoster
.Ur not mentioning ur age.As u say it is slightly stingy that symptom ususally seen in the age grp below 40.So don't worry shingles can take 4-5 wkto heal. Still u take opinion of expert dermatologist
& if he advice for skin biopsy
kindly go through.Also done ur routine count &other test .