I've had the constant ringing for decades as well, so, I only even notice it once in a long while, when there's silence, (there rarely ever is), or if I think about it.
I've been wearing either earplugs or IEMs in my ears, when I play live, since around the year 2000. I've been lucky enough to have light handed drummers for the last 20 years, as well. I actually JUST started NOT wearing them, at certain places, and it's been fine, but yeah, it'll be IEMs or earplugs for the most part.
I have something else that's been happening to my ears, for like, the last 30 or 40 years, that I can't figure out what it is. It only happens like once every few months, for like 5 seconds. It sounds like a "groan" or vibration, it's "note" descends about a whole step, and then it just stops. It comes out of nowhere, and happens when I'm just sitting on the couch watching tv. Strangest thing.
Also, about the same occurence frequency, one ear will "mute", and ring loudly, for about 10 seconds, any my hearing in that ear slowly comes back, in that 10 seconds.
I really wish I knew what both of those things were.