When i touch a spot on the lower part of my neck above my collarbone, i feel a strange vibration that's very noticable. it's not my heartbeat. what could it be?

A thrill: This vibration is called a "thrill" and usually indicates a connection, or fistula, between an artery and a vein. There are many arteries and veins in the region you describe. See your doctor- this is not a normal finding and should be diagnosed.

Thrill: This sounds like you are describing a thrill which may be due to a strong heart murmur or other arterial abnormality. Further evaluation by your medical doctor may be required and may consist of either an echocardiogram or arterial ultrasound.

Thrill: This sounds like you are describing a thrill which may be due to a strong heart murmur or other arterial abnormality. Further evaluation by your medical doctor may be required and may consist of either an echocardiogram or arterial ultrasound.