I too have internal vibrations. I have had them since 2019. I turned 64 in October. I first thought it was result of injury to phrenic nerve after swallowing a huge gulp of air with morning meds and had pain for 2 days in upper mid sternum. I also have vertigo and have lay in bed for 5 hours with NO vibrations. They only occur AFTER I go to sleep. I have been keeping journal and rating them on a scale 1-10. They move around in my torso area and at times settle in the pelvic area. I do have major issues with spinal cord and low back and cervical spine pain. My neurologist seems to think it's from over stimulation in my brain and wants me to try Fycompa...pediatric dosage. I'm having the second half of sleep study Jan 18th to wear a nose cpap. The apnea isn't severe, the Dr. said, but now I see where sleep deprivation can contribute to the vibrations. It's just more annoying than anything except when they are level 8 or higher. I have to sit on edge of bed for a bit. If they are strong, I can't go back to sleep and so I get up. I can place my hand on my side and actually feel the vibrations. I have also worn a heart monitor to see if it might pick them up but it didn't. I'm hoping the nose cpap and/medication helps. I'd love to go more than 1 night without having vibrations. I haven't slept past 5:00 in 10 years, some because of job but I have been up as early as 2:00 with vibrations. My symptoms don't fit other conditions and vice versa.