There is a Dr here who got ear ringing after a vaccine. I think it was the Covid vax. She can’t figure out the cause and is frustrated.
It’s an area of medicine that seems to be elusive for many
I went to a tinnitus board and it was depressing to read. They try all kinds of things and most of them have no results
Yes, it is impossible to treat.
Drugs can cause it, Aspirin especially.
Fireworks, gunfire, loud engines can cause it.
No treatments work effectively...................