Yes, I have this too, cause unknown - although neurologist suggested exposure to something toxic. I’ve had it for several years and its severity fluctuates.
I don’t take any medication, my neurologist advised me not to. Wearing fleecy slipper socks in the evening so that my feet can feel the floor more than is possible in shoes or slippers helps in my case, also standing on extreme tiptoe during an attack, which usually means getting out of bed just as I’m falling asleep. Sometimes I have to get out of bed and walk around in a zombie-like state, and that helps too.
It’s a cruel condition, especially as it often disrupts sleep, but I think it’s possible to improve things with little self-help tricks that, if you’re lucky, will work for you. For me it’s been trial and error.
I hope you find something that helps you. And yes, roll on a treatment that works! I hope someone clever is doing some research.