Hi Bellasnan.
I get that too, feels like fizz, or creepy crawlies in my veins. Very uncomfortable.
I usually get it just in my calf's, the other night when I had it, it was all my legs. Both of them. Although the right leg was worse.
Maybe the hot flush is just a coincidence at the same time, I don't have hot flushes, I think, I get RLS because I'm always on my feet. 🤷♀️ Who knows.?
I also have an achey back a lot of the time, ( slipped disc years ago) and I'm thinking it has something to do with that, like nerve damage or something.
All I do is rest my legs on an extra pillow in bed. But whatever you do, it doesn't go away does it?
Xx