Oh dear! Like everyone mentions already ,many medications make our system so sensitive and rsd make it worse for some other. I can't tolerate heat at all, I develop heat rash and is real painful, and sunburn as well even if I'm inside of some areas where the sun don't hit me directly but stills gets me.
You really need to learns what can be your triggers and if sunlight is one of then,consider about exposure for so,long, you really don't want to develop something more serious due to something you can avoid ,is hard when you are used to but rsd requires lots of,care and many sacrifices that will at the end the best thing you ever do for yourself.
Hope you a nice week full of relief and less, less pain everyday ,with love Jesika .
Ps nice meeting you.