I almost screamed because I literally just found this out at a dentist appointment yesterday.
I was told before that it looks like I grind my teeth so I should wear my retainer every night (it's essentially a mouth guard), but I didn't know the word bruxism until yesterday.
Tbh it kind of scares me. I'm only 23 and idk how long I've been doing it but some of my back teeth are already so worn down and kind of sunken in. My front teeth all look good though which I'm thankful for. It's just worrisome to find out that there's no "cure" for this, just the safeguard of a retainer/mouth guard.
I just saw you mentioned pain though, I've never had pain from it actually..