That frequencies used for mobile communication are much more powerful. My a-cheek didn't change to worse or good, showing absolutely no difference to the second a-cheek.
Just a few things to consider for your decision:
- all radiation devices are tested by governmental institutions for direct harm on biological tissues.
- since the mobiles are massively used world wide, a lot of people try to find some effects on the biological tissue. Being the first to find negative effects would result in a lot of credits - the money scientists are payed with. No serious investigation/studies show negative effects.
- the low power radiation of Bluetooth don't have enough energy to warm-up the tissue. Other effects, like changing DNA or causing cancer can be ruled out, as there is no evidence for that.
- Bluetooth, Wi-fi, mobile... Insert your favorite in here, are digital. Meaning "1"s and "0"s are used to encode the information to be transfered. We use mathematical error corrections - there is no necessity to increase the signal's power in terms having a good signal, like it's with fm-radio.
- half of worlds population is using this sorts of gadgets since a long time. If there would be some adverse effects, it would be known surely xD
Writing this with my wi-fi and Bluetooth enabled laptop on my (l)eggs xD
I haven't heard of anyone having problems with Bluetooth-enabled hearing aids. And surely the ENT docs would know first hand as a result of working with their patients, and dissuade use of the feature if it was problematic.