WEIRD. I got out of the shower today and noticed I had a cluster of pimple, blister like things on my breast. I've never seen anything like this on my breast before. Could it be shingles, or a cold sore? It reminds me of this rash I had on my thumb before. I had itchy, clusters of blisters on my thumb and still don't know what it was because i never went to the doctor. I just put a bandage on them until they healed. They never spread i think because i kept a bandage on it. Ugh help..i don't know what this is! Anyone have something similar on their breast? They just popped out of no where!