Strangely enough, when I had my 5 stents in 2009, the buzzing became a new sensation. It occurred mainly after waking up and seemed like my heart needed a bit of time to get working properly. Once I had stood up and walked around for a few seconds, it seemed to stop until my next sleep. It didn't really cause any problems, and it didn't worry me. My Cardiologist looked at me as though I was nuts when I mentioned it.
Since my 2 stents in March this year, that buzzing has gone away. Now, I have no idea what it was, but it must have been heart related.
Could be lack of b12 vitamins, I have low b12 count and i GET IT, DID some research and it does cause this
I took MMS for 2 weeks and I have no more vibrations at all. I also got rid of all the "floaters" in my field of vision as well as some muscular ticks.
I too have suspected that my vibrations may be caused by a parasite. I had severe heart pain and coughing in Seattle when I visited my daughter for about 4 weeks. I couldn't sleep on my left side. When I came home, I then experienced a vibration in my heart. I went into the hospital for observation. They could not pick up the vibration on the heart monitor. I originally attributed it to GERD, I've had a nuclear treadmill, echocardiogram and gamma machine that detects blood flow into the heart. I will get the results on Friday, the l0th. The only relief from the heart pain was by taking several antibiotics that I had lying around the house. Now the vibration has quieted but I have odd sensations around my heart and up through my back, especially when I try laying on my left side with a tightening feeling. Also I feel odd isolated feelings in certain areas of my body. I'm glad others have had these feeling because when you talk to others about it, they look at you like you're a little looney.
KathyP