Not sure exactly when heat/cold intolerance came on for me.
Just don't seem to be able to handle either extreme very well anymore.
With that being said, and Autumn (my first most favorite season) coming on ... I dread what's on the other side of it (Winter).
Everthing hurts so much worse during those cold, dark months.
Telling myself to not overthink that one, otherwise I'll miss all the joy and beauty of my most favorite season (Autumn).