Not permanent but there is a trick to make it go away for a short time. I read about it recently and it works for me.
1. Place both hands on your ears. Palms tight on the ears and fingers backwards
2. Now tap with your fingers on the back of your neck. It doesn't have to be hard. It will sound very hollow.
3. Keep tapping for 30 seconds
4. Stop and remove hands from ears
Your ringing should have gone away. For some people it goes away for hours, others just a few minutes.
This is always posted and it always irritates me for some reason. It isn't even worth the effort and it makes me more anxious knowing the tinnitus will return in seconds. It never works longer than that for me.
The only relief for me is to accept, ignore it, and do no further damage. Healthier living (lower blood pressure) and time (8 years) seems to has lessened the symptoms.