@pro123 hello, I found this thread as I was searching for people who are experiencing the same thing I am. I have been to every specialist on the planet. Apparently I’m a pillar of health ( rolling my eyes) I also have internal vibrations upon waking only. I have zero health conditions. Even had an MRI of my brain. But the one thing we are all having in common is that it started after getting Covid. Something happened to my fight or flight system . Covid completely deregulated my nervous system and I was having adrenaline, surges, panic attacks. Symptoms that seem neurological in nature(incomplete yawning) (auras)( stiff neck) but the neurologist has cleared me. After I got Covid in June, I haven’t been the same. A lot of those neurological symptoms are gone but what I’m left with is panic disorder from the trauma those symptoms gave me, heightened anxiety , hyper fixation , sensitivity to noise, loud music, extremely allergic to caffeine, alcohol and for the last 5 months internal buzzing only upon waking. At first I thought it was perimenopause bc I’m 45 but I went to 3 different doctors and had a full panels at different times of ovulation cycle done and none of them think I’m even close to perimenopause. I really believe the internal buzzing is linked to a long covid symptom