N.B.
Hot flashes are very sneaky. I don't know how many times I said, "Is it HOT in here?" before I realized it was just me! I also went through a summer of being too hot, then too cold, then hot, then cold, etc. before the light bulb went on over my head--- night sweats. ( They were first.) I've never heard of them just in your hands, but anything's possible. I would at least talk to your doctor's nurse.