As tempting as it may seem, do NOT treat frostbite with hot water! Don’t do it! Use very cool water, gradually increasing to lukewarm (whoever Luke was… whatever).
That said, I know you’re going to completely ignore me and go with your gut, and your gut says hot water. When you’re done screaming in agony, please take a moment to know that I’m telling you “I TOLD YOU SO!!!” across the miles. That is all.