I have had a high pitched sound for the last 4 years. I woke up one morning and had this loud noise in my left (and only left) ear. When I went to the doctor they told me that my symptoms (sudden, high pitch, one side, constant, no external source) fit into a diagnosis of acoustic neuroma. Basically a very slow growing tumor along my auditory canal that destroys the nerve endings as it goes. But the only way to confirm it was with an MRI. After talking with my doctors and researching it myself I decided not to even bother with the MRI. Even if they confirm it is acoustic neuroma, there is no treatment and no cure. If it progresses, and I live long enough, it would grow along the auditory canal until it reached my brain. But that could be 20 years. Also, even if they performed horrific surgery to remove it - the damage to the nerves has already been done. And get this - the tinnitus does not go away, even if total hearing loss results.
As others have said, it drives me crazy. The constant loud sound, that no one else can hear, keeps me on edge. When I hear a similar high pitched sound on TV it makes me jump and hurts. Sometimes if it gets really bad during the day I end up with a horrific headache. No white noise helps to mask it. And as someone mentioned, I have thought about driving an ice pick in my ear. It really does drive us crazy - kinda like hearing voices in our heads that no one else can hear.
I guess that is why my doctors have prescribed a tricyclic antidepressant (yeah!!!) It helps deal with it, helps with the "going insane" thoughts, and helps with sleep. So I have decided to stockpile the TCA's since it is discussed as a method of ctb. And having different methods available is always a good thing.