HI Lawchick, from what I understand, it's a reaction from the sun, that may be the reason he said not to worry. Of course, if you've never had it before, I can imagine you would worry, alot. I've gotten a dime sized blister on my hand from a few minutes sun exposure a few months ago. I just looked it up and went hmm, well there's another symptom to add. But, that's me. Everyone is different. One of my signs of the confirmation of my sle was my little ol butterfly rash which now migrates a little bit on my cheeks. When I first met my rhuemie he pointed it out and asked a slew of questions and sent me to the lab to confirm his wonderings. My butterfly rash, well I would call it more of a small moth, will get tiny blisters if I am in the sun more than 5 minutes without shade. lucky me. It also burns like crazy.
I have learned, the more I obsess about it, the longer it stays. I reckon it's good ol stress....