The only recent risk factor was a guy accidentally bumping into me in the locker room at a gym about 4 1/2 weeks ago(we were both naked) - but I'm not at all sure his genitals contacted my skin at all, (I think it was just his stomach area),plus, he bumped into me on
the other side of my buttocks, not where the rash
is now. I've read that herpes can occur on
the buttocks, and much of the info on the net says that herpes can look different from the classic thin-walled blisters.