I started with a few small red bumps on my shoulders, which I thought might be spider bites because they weere in a sort of line. Next I noticed the my upper chest developed a slight raised pinkish rash. It itched just a bit. I used antibacterial cream didn't do much but did not get worse. When I thought it was maybe going away, I noticed large reddish bloches on the under side of my breasts. Not itchy.
These symptoms started about 10 days ago. I am visiting in AZ and had been in MD. These areas were not exposed to sun, but heat when hiking.