The other day, my hands suddenly felt very hot and tingly. I looked down at them, and there was this splotchy orangeish rash all over the tops of my fingers and sides of my hands, and the most distal part of the top of my hands. my palms and the bottom of my fingers were bright red (almost purple) and felt tight and painful. My hands were slightly swollen, hot, and sweaty. I had not come into contact with anything unusual recently. Everything returned to normal after around thirty minutes. The rash had to have appeared in under three minutes (approximate last time I looked at my hands).