Red, flushed face and hands
I suspect my condition is stress-related as I had a very bad spell of anxiety this year.
For the last few months my face has been inflamed, in a subtle enough way that it almost appears to give me a tan. Sometimes it flares up and clearly resembles a rash, most of the time the skin is just slightly red all over. Triggers include showering (hot water), some skin creams and shampoos etc.
What prompted me to post though was something to do with my hands. I was just running some things in the sink under the cold tap, and noticed an odd sensation in my hands. My index finger was "burning" and turning red in response to contacting the water, and all of my other fingers were feeling the opposite, as expected, that it was very icey cold water, and they weren't turning red in response to coming in to contact with it. What's that all about?
Google wasn't much use, as I get too many conflicting results for "burning" your hands in a fire etc.