Sorry about your ear and hearing.

I suggest you look up 'tinnitus' on many medical websites online to get a range of insights and opinions. You will learn the many causes, most of them vague and impossible to ascertain for sure. Important to check medical sites, as well as some that have chat groups that also offer insights.

Good idea to have a serious consultation with an ENT or even better, a hearing specialist. Tinnitus can be age-related, and evidently nothing can be done about that.

Get practical and hard-core information from checking a variety of medical sites (not the ones trying to sell a product) online. At least it will arm you with information. And you will learn about the myriad of possible causes and effects. I did not get the impression that it can be 'cured'. Good luck with everything.