I made my first comment on this site last night. I too have what I call internal vibrations or buzzing! Usually only in bed when trying to fall asleep or waking up with them. I do sometimes get up and walk around but that really doesn’t help much. I am not hurting at all, just wondering what’s going on!? I have not had Covid but have had all the shots. I am a female almost 74 and no other physical problems, except for a recent diagnosis of ortho static tremor in my legs! A neurologist told me I have what used to be known as ‘shaky legs’. All that means is that I cannot lift up both feet at the same time or I may fall over. I’ve been very careful to always hang on to something when I slip on a pair of shoes! That’s it, so I haven’t fallen since the diagnosis. Might that have something to do with this shaking inside? I just don’t know and my neurologist did not know what I was talking about when I mentioned these internal vibrations. I have read on this site about others having these vibrations. Any comments from others experiencing these symptoms?