I have had all the tesst done for tinnitus, ENT, MRI, hearing tests.. etc.. all good.. I note though I have a mosquito type pitch in my left ear area only, and on that side I had my first root canal, which was done incorrect, a root nerve had been left in.. and I did not know this... long story short, tooth became infected, shortly after, tinnitus, got the root canal, tooth is on left side upper back ... after tinnitus was worse, then a little better.. but strangely.. when I went to get this tooth crowned, the dental freezing completely took away all noise in the ear after... it was quiet, no noise at all.. a relief, but when freezing gone, it came back.. what is your professional opionion of this..? Thank you... Barbarajean