@Michael Leigh
My profile might be confusing. I had a low hum in 2016 for 2 weeks, than 2017 for 1 week, and again from 14th October this year. It actually went away all of the times. My guess, that was probably stress induced and only in my left ear. Which distinguishes this time from the previous ones, is now for 2 weeks I was literally unable to sleep more than 1,5 hours. So I got panicked, went to doctors, got an audiogram, audiologist said its normal, ENTs prescribed me Nootropil (piracetam) and betahistine. The low hum is not audible now, thanks God. But 2 weeks in, I noticed a very high pitched sound. That's not a constant tone, varies between sizzle, hissle, whistle, tonal, screaching sounds and is bilateral. In the meantime I used a topical ointment containing neomicin for exzema like twice. This high frequency sound seems to be staying. It's actually "better" than the law hum, easier to mask, but still drives me crazy and messes with my mental help quite severely. My health anxiety and obsession about it probably don't help either.
MRI is OK, I don't know about TMJ problems. My neck is cracking, but it has been for years. I stopped all the meds, because I suspected that they may contribute to my insomnia. I'm using sound enrichment.
It can be noise induced, because I was unaware (and quite frankly stupid) about risk of headphone use. I stopped immidiately after finding this forum.
I know that you are a firm believer in TRT, but in my country I haven't found therapists who work with them, but I will ask about it in the local group again. Audiologists were no help, both times I went, they practically told me there is nothing to do, only advice was to get used to it.
And also, sorry, everyone for venting about it on TinnitusTalk all the time.