No I haven't really be thinking that, but I have been wondering what was going on. Turns out, after some slight investigating and some somewhat humiliating displays of my nasty feet to my teammates, I have chilblains.
If you're going "what in the world?" then you're reaction is the same as mine. Often mistaken for frostbite, they occur frequently from exposure to drastic and sudden changes in temperature (as is the daily norm in Lhasa, just walk from a sunny spot to the shade to have the experience). One website said that 1 in 10 people in the UK get them at least once in their life. I don't know what that has to do with me, but it did bring me some comfort.
Anyway, the good news: they go away naturally in a few weeks (read months at altitude where everything takes longer) and so the remedy is simply: keep your fool self warm.
Got it.