There ARE cures. One person I know started taking high quality fish oil (not a shill for this company but I trust it because within two weeks of taking it my special needs three year old started speaking finally) — one good brand is Nordic Naturals — and the tinnitus disappeared.
Seriously, do not give up and don’t do surgery. Research other dietary ways. I am not kidding, someone plagued with tinnitus for years started taking the EPA fish oil from Nordic naturals for other reasons and never had tinnitus again.
Oh, and stop eating pufa oils at the same time you start taking the EPA. The point is to get your omega 3s way up and your omega 6s way down.
No packaged foods or any food cooked in canola oil and other seed oils. When you have to eat out all their stuff may be cooked in poor oils like those. So at home never use them. Only coconut oil, butter, very high quality organic olive oil (most are allowed to have bad oils mixed right in and sold as olive oil). Packaged snacks (chips) would be huge offenders, though there are some health food brands switching to coconut and avocado oil cooked chips.
My friend has stuck to this diet and his tinnitus never returned.