You would probably want to discuss this with your doctor.

- I can't imagine using in ears for 8-10 hours out of the day, assuming you even let your ears have some time to rest and 'breath' during that time.

- 56db/60db is perfectly fine, I don't think volume is your problem.

- If you are going to have that long of sessions and are running into these problems, maybe try switching to a lightweight headphone that is compatible with your iOS device to give your inner ears a break while you sort out whatever issue you are having or sit down with your doctor.