Tinnitus is a complex condition and can have many etiologies, so there are many different therapies which might work. I am an Internist in my real life, but love playing Bass for fun.
Treatment can be broken down to some broad categories.
First- Behavioral therapy which includes the subsets of Tinnitus Retraining therapy (TRT), Cognitive Behavioral Therapy CBT) and Biofeedback. There are papers reporting on all 3 of these, and TRT seems very promising.
Second- Drug. Misoprostol, Lidocaine, Steroids and Alprazolam have had small studies of limited benefit, I would not start there.
Third- Masking. This is where you use "white noise" like a low volume radio tuned between stations, or wave noise generators, etc. This is a very standard therapy and has already been mentioned but results seem remarkably variable, still it is cheap and easy to try, so why not?
Fourth- Electrical stimulation. This has a wide degree of varieties, range from transcutaneous to cochlear implants, so we are clearly in ENT territory, but it is an option, depending on degree of incapacity.
Accupuncture and repetitive transcranial magnetic stimulation have not been shown to be effective.
In short, you need to see someone familiar with tinnitus, who is familiar with all these options and to work with them, try white noise in the meantime. Most Docs are not familiar with all these therapies, so depending on where you live , there may or may not be a tinnitus specialist, but usually look to ENT to begin. Hope that helps as a brief overview, there is a lot more detail out there, but this forum isn't the place for that level of detail.