I’m curious what causes this, especially when my HR can be in the 60s-70s and it’s happening. Would you consider this different than internal tremors? It’s hard to tell because this feels like my pulse, but in my head, chest, neck and even in my legs at times. Others have told me it sounds more like internal tremors, but it’s not a vibration feeling. My body does internally shake, but again it feels like it is shaking to my pulse (even though it’s not always high). It’s a new symptom and quite uncomfortable. My dr believes it’s due to an overtime sympathetic nervous system brought on by covid.