I think fleeting t is just a side effect of stress too and nothing to worry bout i noticed it happened alot after i got my permanent T cause im more stressed out.. And my gf and lil sis are always having the fleeting t too so i try not to worry bout it when it happens but its more or so impossible to not worry that your T is getting worse or something but since alot of people experience it T and without then guess its a part of life
It's quite interesting this fleeting T.
When I got temporarily T in the past from noise accidents at work, this fleeting T came by and faded out my T completely.
After that, I had no T at all. It has happened every time.
Thats why I always got happy and knew my T (this high pitched hissing) would resolve when this fleeting T arrived.
I think its the ear calibrating/healing or something. Hard to say.. I know that perfectly healthy people without constant T also have this once in a while. I even had it myself before the onset of my T. It appears to be very common.
But it kinda puzzles me why my hissing T always resolved when this fleeting T came by for a few secs...