I think I detect a cluster of blisters at the top of the photo. That would make shingles (zoster) possible or possibly herpes simplex, regular herpes, though that is less likely. I think you should see a doctor right away. This is not because shingles or herpes is very serious, but because you need to know what this is so you can be treated for it, and so you'll know whether you're contagious. Go tomorrow.
You were right Doc. I went to the doctor today and he said it was Shingles. He prescribed 500mg Famvir 3x a day for 7 days. That sound reasonable?
Thanks so much for your help.