Several causes: Shingles usually causes cluster(s) of tiny blisters (vesicles). If you have pain in a much wider area than is covered by the blisters, shingles is likely. The same is true if new clusters appear in the same general part of your body. Insect/spider bites are also possible. If the rash becomes more generalized, you may need one of these areas biopsied to get the diagnosis.
Answered 6/12/2017
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