I was wondering if anyone has any follow up results.
I've been getting this more and more over the last 4-5 years. It creeps in the closer to bed time it is, not so much when I'm rested. External anxiety worsens it, but doesn't cause it. I'll feel a surge in my left side and a vibrating electricity down my left side from under my stomach down into my toes. sometimes the vibration spreads if i can't sleep, then it leads to bathroom struggles (frequency/restriction).
On bad nights the internal vibration leads to external toe twitching and clusters of muscle spasms on my left foot, and this is chronic. If I can't sleep sometimes it leads to full body shakes and lower body temps (like you'd get with a fever).
I find protein and fat help calm it down.
I have a long history of unexplained neurological issues though, the doctors always blow me off as anxiety. I used to get bad involuntary movements, but this predates the smartphone era so when I tried to bring in video of that to show the doctor, he wasn't interested and called it "obsessive", so I've suffered with it in private doing what I can to manage it.
anyway, the buzzing/vibrating stuff got worse while the external movement stuff lessened. I'm going to try Alpha Lipoic Acid supplements next, though they are mainly marketed towards neuropathy patients.