Could be shingles: Clusters of vesicles on a red patch could be herpes simplex or herpes zoster (shingles). Both start as pain/itching, although shingles is more likely to be painful. Shingles usually has several/many clusters of vesicles in a linear (dermatomal) distribution. Not all clusters come out at one time. Please see your dermatologist for treatment. Shingles is contagious to people who never had chickenpox.
Answered 4/30/2013
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