I got a pretty bad exposure when I was out a few weeks ago. I actually thought I'd rubbed up against some rust or something, as it initially looked like a few rust-colored blotches on my inner wrist that just didn't want to wash off. Within a few days, they looked like three huge bug bites, and by a few days later I had tiny red itchy bumps on both of my forearms, my neck, all over my abdomen, and on my inner thigh.
It could have been a snake or spider (or gator!) bite, so I didn't want to complain too much, but the itching was so bad that it woke me up nights when it was at its worst. I finally had to cover my wrist because the scratching in my sleep was causing the sores on my wrist to bleed. Yuck.
Very hot water and rubbing alcohol were the cures for me. I also tried Cortizone-10 and Lanacane with no success, although the Cortizone feels nice on the dry patches that I have left.