Hi, I already posted a message in this thread, so it's just an update (and again sorry for my mistakes I'm french :-))
I'm not sure everybody talks about the same exact problem but it's great to have this place to talk about it. I'll talk about my condition, the MRI scans I had, the drugs I take and what I think it could be for me (but even the doctors don't know so who am I :-))

Let me try to explain my condition :
- Vibrations in the back of my neck, sometimes arms and face. No pain at all but it wakes me up at the moment I fall asleep. It can be every 20 minutes during all night. When I'm lucky, it's only in the morning. Some good days and some bad, is it a cycle ? I try to find out if it's related to what I ate, drank or did the day before (sport, video games, etc... ?) but it's not clear. Maybe few drinks can make it worse but I'm not sure 100%, I don't drink every day 🙂
I just have to move my neck, turn my head on the pillow to make it stop almost immediatly but it can quickly come back.
I have this condition before COVID so it's not related to the virus nor the vaccin.

Maybe it's not related but the condition appeared when I was cured for cervical herniation with Amitriptyline (Laroxyl) and Gabapentin (Neurotin) and sleep apnea (15 by hour, not severe), yes in the same time. The vibrations intensity was high and very scary, I felt it even in my eyes ! Ever since the intensity declines. One thought was that my muscles were too stiff because of the hernia and that they loosened up thanks to the drugs, and that the vibrations came from that. But I'm not sure now that the herniation is gone and the vibrations go on.

Scans :
MRI scan : in 2019, cervical herniation, cured. It was not there anymore in the last MRI scan.
And something very common (I'm 50 y.o by the way) : C6-C7, global osteophytic disco prominence with bilateral foraminal narrowing (thanks google translate).

Drugs :
I always take one pill of Gabapentin every day in the evening and my neurologist swaped Laroxyl with Rivotril (klonopin). For me Rivotril is a good temporary solution (addictive drug, but for me 7 drops are fine and I didn't notice addiction when I stopped it progressively). My neurologist said after 5 or 6 months with Rivotril to stop taking it and to take it again only if I need it.
I had several weeks without vibrations at night, or just in the morning. But sometimes one night they wake me up 2 or 3 times, and the night after is worse. So when I feel that they come back, I take some Rivotril and it's like the vibrations are present but in a damper (not sure of this word 😉 : like a damper pedal), and I can go back to sleep more easily.

So my guess ? I think it's related to the foraminal narrowing : "the tunnel in wich is the nerve is narrowing". I hoped that it could be a muscle problem (muscle fasciculation) but I'm afraid it's neurological. My neurologist said that the only thing I can do with osteoarthritis (it's a kind of osteoarthritis) is to slow it down with muscle-strengthening (kinesitherapy). Surgery can be done but only in severe condition.
With the help of rivotril I can sleep pretty well but I don't want to take it every day.
A good thing : it makes me eat healthy, have a physical activity, muscle-strengthening almost every day, the only weapons I have against this condition. And during the day I have no problem at all. Sometimes I just don't sleep well, life could be worse,..

I have an appointment with a rheumatologist in september, maybe another update !
Hope my english is not too hard to understand !