I was talking about various available treatment choices some years ago with my brother, who is an ENT and also suffers from Tinnitus, and he had seen too many that made things worse to recommend anything beyond pursuing internal serenity.
There are apparently many types of tinnitus (no surprise there), and making things worse is not something I'm excited about.
As I've mentioned I have bad T and also bouts of really bad hyperacusis. I was aware of the claims for TRT (Tinittus Retraining Therapy) which I knew had some level of empirical studies in it's favor (though not definitive), but I never tried it. When I had an acoustic accident that made my hyperacusis unbearable I had the "nothing to loose" moment and found a nearby place offering the therapy. It's a similar therapy for Hyperacusis as for Tinnitus, a main feature being the use of hearing-aid-like noise generators that you wear most of the day, piping in a mild white-noise to get your brain acclimated to sound again. (The presence of the constant noise also decreases percieved dynamic range somewhat, which helps).
Did it work?
No it didn't completely cure the issue. I still have some hearing sensitivity and won't be attending loud movies or concerts any time soon.
Still, after about two years of wearing the devices I had moved from virtually disabled to my normal baseline. In fact I'd say I'm better: I can listen to music at much higher volumes comfortably than I ever could before.
Given the length of time it's impossible to say from this anecdote that I wouldn't have just gotten this much better without the therapy. So for me the jury is still out.
But I can say that the gentle noise generated by the device (a noise sculpted specifically around my hyperacusis issues from testing) immediately
brought some relief to my condition, as soon as I put them on. And I improved pretty quickly from the first month wearing them.