I too have this strangeness. My face gets extremely hot and flush. Sometime the skin burns and Stings. This along with red hot ears. It drives me batty. It also happens 97% at night. I can't figure it out and have quit trying. I just keep telling myself one of these days it will stop. Take care have a good upcoming weekend.
Mix 3 drops of tea tree oil to 1/4 tea spoon of facial moisturizer and apply to where it's warm.
It works for me to help ease the flush hot face.
It kills a type of mites that lives in our face and might cause that. If you do try it, let me know if it works for you