It always goes away, until one day it doesn’t. Then it just keeps getting louder and louder.
Exactly.
And I can pin-point 3 instances that greatly contributed to my mild tinnitus in my younger years....
1) as a teenager a buddy put this 'black widow' firework (explosive basically) about 8' away from me when it went off. He is no longer a buddy.

2) seeing Motörhead in '98 without ear plugs, 3rd row. Lemmy even goin' "Dave, crank it up with 10 percent, will ya?" to the FOH guy.
3) being in a rehearsal room with a band around 2000-2001, kneeling to adjust a delay pedal, when everyone is still setting up and the drummer starts tuning his snare drum at full blast less than 4' away from my ear.
Especially #1 and #2 didn't leave a 'beep', but a hiss! For days it was like I was hearing a gas-pipe leak. Yes, that went away... but so went my ability to hear above 17kHz and having tinnitus now. Luckily, I acted quickly and got these custom molded ear plugs (-15dB filters) and have been wearing them for over 20 years now. Even dabbled with the -25dB filters, but they weren't as linear and ate up too much low-end, so it gave you the idea that your amp sounded really thin, causing you to up the Bass and Resonance to counter...but without plugs it was way too boomy in the room then.
But the big benefit of these plugs, is that aside from lowering the volume, everything becomes more balanced and clear.
When you wear them, while watching another band, if a buddy is with you in the audience and he/she speaks to you, you can hear them more clear than without those plugs.
Of course I wear 'em on stage, as we have a shit-loud drummer (>120dB easily) that plays Paiste Rude cymbals for added crash-bang-wallop.