My tinnitus arrived one day about 3 years ago, before that I had a strange problem hearing bass where one day my hearing would be fine, the next anything under 200hz would be missing.
I've had grommets inserted and my sinus's drilled out and although its slightly better, it isn't what it used to be. It still comes and goes.
Next, I'm up to see an audiologist, whatever they are? My ENT basically told me (after they'd poked and drilled my nose and ears out) that they haven't a clue and have done the surgery based on guess work.