I don’t know, but I would suspect the problem to be neurological, not physical. If it is a medical condition such as hyperhidrosis (excessive sweating) or diabetes – low sugar in the blood could affect sweat production and you will start to feel hot.
If hyperhidrosis does not seem to be an issue for you then perhaps your feet are too cold and that’s why they sweat so much? Or maybe your shoes just aren’t made well enough or fit properly?
My advice would be to go out and buy some new shoes because nobody wants their feet sweating inside of sweaty shoes!