hi all. I too have this vibration. Had it since 2018. told dr about it and had me wear a heart monitor, which ruled out it was heart. I notice it at night right before falling asleep. I will also notice it when I wake up for a few minutes in the morning. I am a 71yo, woman, i rarely drink, diet is keto, and i think I am fairly active by playing pickleball 3x/wk. I do have graves, but it showed in one eye. I take selenium to keep my t3 and t4 in check. I can't say if having covid made it worst dr would not test me for antibodies, even though my husband had it and found out because his dr tested him for the antibodies. I won't rule out covid or the vaccine has made it worse after hearing the spike protein could attach itself to different of the body. at night i take amitriptylin to get to sleep. It doesn't relieve the vibs, just helps me get some sleep. i couln't find anything on it 5 years ago i am happy i am not alone and not totally crazy.