Andy, we wear the same underwear apparently.
Also, that kind of burn would leave me paralyzed with itchiness. I've encountered it twice in my life: once when I was 12, once a couple of years ago- when suddenly then entire length of my back begins to itch and not just surface itching, but a real, deep clawing itch that feels like insects are burrowing into my muscle. Naturally I can't scratch as that creates an intense pain but I can't take it either. I'm generally reduced to sobbing screams into a pillow until it goes away.