Completely. Cold makes you swell up and districts blood flow and hurts joints. Heat causes a weird feeling almost exhausting

I hurt worse with the cold. My joints lock up. Heat isn't too bad unless it's storming and humid.

For myself, I can't stand the heat. I didn't particularly enjoy it before Fibro, and I certainly don't know. I immediately become soaked in sweat, beat red in the face and chest and my heart rate is over 100bpm (beats per minute). I become severely irritable and agitated as well.
In terms of using heat as a form of ease and comfort from fibro pains/strains, I would say yes, it does help me. This is especially true for warm baths and heating blankets.

Heat helps my pain -- maybe it just helps to relax me, I don't know. Cold makes it worse. That's my two bucks. (inflation, you know) :-)

This is so frustrating with the heat. Thank you for the info