Tingling fingers in high heat?

I’m not sure if anyone here can weigh in on this, because Google hasn't really given me any helpful answers!
So, what could be causing my hands to cramp up when I'm dealing with extreme heat? 🙏 It’s only happened twice so far—maybe once every few years—but only when my body temperature hits above 102°F! I don't have any underlying health issues otherwise, so I'm honestly a bit stumped...