Where is all this heat coming from?

Since just before my NHL/MZL diagnosis, during my treatment and even many months out from remission, I have always felt over-heated. It's almost like a menopause kind of feeling but I am a male.

It's not my thyroid and I can go into an AC-filled building and still feel over-heated. It's also not my temp because I can feel over-heated, take my temp and it's only 97.9 or 98.5 or whatever. My BP and pulse are always normal as well and I don't tend to sweat when I feel over-heated.

The "epicenter" of this inner heat seems to be my abdomen and it radiates outward to my chest and other parts of my body. It's almost as if I'm a star in the sky, glowing and radiating heat or something. I've taken PPI's and they seem to help a little sometimes but the heat is always there on some level. The only tiny bit of relief I get is when I sit directly in front of the AC. I guess cancer plus treatment equals heat intolerance?. Anyone else have this issue?.