Myself and my father both developed severe Tinnitus after our Pfizer vax. In my case i ended up with hearing neural hearing loss as well. a heavy dose of steroids relived it but this was about a week too late, the tinnitus has lingered and the hearing loss is now permanent.
Ive tried most things to get rid of the tinitus. its definatly stress, heat, blood pressure sensitive. mechanical pressure has an effect. sauna for instance with make it much worse as does intense exercise.
There are old reports that T4 direct to the ear drum helps. I tried this with Georgi's T3 and it did nothing. the problem is that if there is structural damage to the hair cells that line the cochlea, there doesn't seem to be evidence for them regenerating. Attempts to retrain the brain to filter out the hum have been more successful.
I suspect endotoxin has a strong effect on this but not directly, only by increasing systemic inflammation. It just happens that most people have a daily cycle of endotoxin exposure through shitty foods so its that that constantly triggers a response.