@dorajak that is very frustrating. I found a reference to a procedure where the pic artery was putting pressure on a nerve causing pain which was relieved by surgery. I think you are correct in pursuing a specialist at this point. I know how difficult that can be with Canadian healthcare. While in this process, you can also look into any audiologists who specialize in tinnitus. They have very specialized training and many tricks to help living with this irritating condition. Good luck with this battle. Don’t give up.