Mine has been going on for 30 years. Initially came from a loud concert. Since then an acoustic neuroma operation made it worse. And getting older has not helped. I've been down different paths seeking relief.
What is helping is the odd realization of the truth. It's not funny but for some of us without a known medical cause or cure, T seems uncontrollable. I tell myself that the problem is in my head and that is helping me cope. I guide my attention and as it shifts, tinnitus is not in control anymore and I can get on with my life. It's like mindfulness. Tuning the focus to the tinnitus has helped because my attention wanders and then the tinnitus subsides and is no longer disabling. I then feel a little less sorry for myself. I hope my story helps and know that we share our suffering but also our love, kindness, and sympathy.