Take a coffee mug and fill it with water to whatever level you choose. Place in microwave and bring to a boil. You may not have to get it this hot, a little experimentation will tell you how much to heat the water/mug. Touch the mug to your bites. That's it. Don't leave in contact for too long or you may blister the skin unnecessarily. You can also experiment with where on the mug to contact the bites. I find that a hot spot on the mug dabbed multiple times on a bite works better than prolonged contact with a less-hot area of the mug.
That’s kinda hard to do on certain body parts…😁
