Can't speak for the parent, obviously, but mine is constant, although at times peaking a bit too much for comfort. Impervious to anything I've thrown at it over the years. You sort of get used to the damn thing, but you never loose awareness of it. Those more or less sinusoidal 8 kHz have been droning in my right ear for about a decade now.

I do what I can to keep my weight down (lots of fruit, veg, fish), exercise regularly (nothing excessive) and take an aspirin each day. It's kept my blood pressure down and alleviated the tinnitus to a level where it's hardly noticeable.

I don't know whether there have been any studies to link high blood pressure with tinnitus but, for me at least, there is some correlation.

I had some tinnitus (unknown origin) for a week or so many years back. It really taught me the importance of protecting my hearing. I feel really lucky I got to experience it temporarily at just that point in my life where I was young enough that it wasn't too late, yet mature enough to realize how serious it could have been.

yeah, you're lucky it went away.

I used to do most of my work within the music industry, which meant going to a lot of shows. Early on I started wearing earplugs. The odd time someone would give me slack for it, but something as fragile and important as your hearing is worth pulling out all of the stops to protect.

I was at this hardcore show a few years ago that was so loud that my earplugs weren't even enough. When I adjusted them, I heard the raw volume of the show --- I'm surprised my head didn't explode.

For me I don't really notice it if there's any other background noise, it just sort of blends in with it, it's only in quiet environments or when I think about it that it becomes intrusive.

Drugs and alcohol tend to alleviate it, but that's not really a solution to the problem.