Hi,
High blood pressure and high difference between the pressure of systolic and diastolic pressure (causes high volume pulse) can cause these feelings. In addition anemia, hyperthyroidism can cause similar problems. Feeling your own heartbeat, palpitations, which cannot be detected on examination also may be present. The vibrations may also be fasciculation or tremors in your muscles, caused by hypothyroidism, parathyroid disorders, calcium deficiency. Please discuss with your physician.
Regards
I also have vibrations going on in my body. Very seldomn the same place. Sometimes my hip sometimes my stomach. It comes and goes. It feels like my cell phone vibrating, but its not because I am always trying to answer it.