Hello. I have posted several times on the BFS thread, but never on this one. I have experienced the internal vibrations also, following a nasty viral illness I had over the summer. My GP performed a lot of bloodwork, which all came back negative, even for latent EBV. I still have some vibrations 6 months later, but not the almost constant ones I had initially. My legs also have the buzzing sensation sometimes. I have fasciculations/popping which started the same day I got sick. They have improved some with time, but I still have them, most noticeably when I am still. Primarily in my legs, although I do get them all over. I had Covid several weeks ago, which did make the fasciculations worse for a bit. There is no question in my mind that a viral illness triggered all these strange neurological symptoms. The neurologist I saw didn't seem to have much experience with this.