They can go into the inner ear, but there's a huge risk they'll take out something else important by accident and make you deaf, so they don't go in there unless it's truly unmanageable.

So they told me.

(Similar problem here.)

Also super interesting about riding. I'm a former equestrian and we're still trying to figure out if this is post concussion syndrome with cervical involvement from ten years of falls, so I'm specifically *not* riding. Makes sense, though, the movement. Best therapy so far has been vestibular rehab, which is similar. They put Sidney Crosby in some kind of orbital machine, but us plebes don't get that kind of star treatment.