Wow can I relate I have had the same for over 3 yrs too. It started out bad at night I could feel it all over my body with these strange vibrations. I went to neurologist and after several tests he claimed I had restless leg syndrome. Gave me a prescription and I never went back. I feel it came from either the Covid vaccines or having Covid which I had both. It’s still with me at night always the strongest. Like you I have just learned to live with it. I don’t think it will ever go away.

It is God awful, isn’t it? I have the “brain fog” and post exertional malaise, rashes and hives and this constant internal vibration. Sometimes they are not as noticeable but they are 24/7. I think that mine didn’t start until I received the vaccine but I’m not sure because for a long time, I believed they were external and I kept trying to figure out what the heck was vibrating! It’s like a low vibrational buzz or hum passing through me. No trembling if I hold my hand out or anything but it keeps me awake at night.