I have electric current sensations running through my head all of the time--especially in temples. This also goes up and down my spine and into feet, arms, legs, and even my crotch at times. When I exercise, get stressed, or eat foods with high sugar content, the buzzing gets really bad. I have been tested for diabetes (negative), have had MRIs to check ear and brain. I have spinal stenosis, cervical spondylosis. I am 60, weigh 176, and have high bp, and in sept. 2011, had a coronary stent placed in left descending artery. The buzzing got worse after stent placement (it is a drug eluting stent).