"Is Bluetooth Radiation Really Dangerous?
Yes I believe it is. I do not use a Bluetooth earpiece, or a cell phone for that matter. But I do occasionally come into contact with Bluetooth and Bluetooth radiation. I have a friend who has a car with Bluetooth installed and for me when I sit in his car with Bluetooth enabled it sets off exactly the same symptoms in me as using a cell phone.
Bluetooth radiation is particularly dangerous in so far as earpieces and headphones go because of the proximity to the head of these devices."
- See more at: http://www.electricsense.com/1791/bluetooth-radiation-lets-be-clear-on-the-dangers/