Hi, I have a cluster of small blisters on my arm. It s the third time I have had them in over 2 years.. They may look like herpes, but they don t hurt, they just itch a little when covered. It just seems like such an unlikely place for a herpes outbreak, especially since I have never had any other outbreak anywhere else... I have lived in hot sunny places by the coast, cold climates in Scandinavia and now I am in Phoenix, all in the past 2 years, so a sunrash seems unlikely also...