I've had noise induced tinnitus since I was about 17 and I'm 33 now. I love music, and ever since I was a child, I can remember being glued to headphones. I habiutated to my original tinnitus within a few months and it never changed at all until about 6 months ago. I don't know what caused my tinnitus to spike so much out of nowhere, but I know I was not kind to my ears in my 20's and I was taking a lot of ibuprophen this summer waiting to get a broken tooth fixed. I've habituated to my current tinnitus, as well, but I'm doing every thing possible to prevent it from getting worse now.
I asked my dad who has had noise induced tinnitus for 40+ years now how much worse his got over his lifetime and you know what he said? It never got worse! He said he can only hear his when it's dead silent. I was shocked and he was shocked mine got worse. My dad was never a music guy, but he's an outdoors craftsman and he only wears ear protection when he shoots guns. Never mowing the lawn, using drills, woodsaws, etc, and he's survived 3 heartattacks. Go figure.