I'd be interested to hear the communities views on this. I have a family friend who runs a successful chiropractic practice and has treated many members of my family, all of whom are happy with the outcome. I however remain a sceptic. Anyway, I had a consultation and was advised that there was a lot of misalignment of my jaw, neck etc, which would benefit from treatment. I did have a significant whiplash and concussion from a fall in August which resulted in a full hospital once-over (but no onset of t), so it could be that has got me all out of shape. I can alter the volume of my tinnitus by manipulating my jaw and I also sometimes get an increase in volume when walking/running. It might be psychosomatic, but if I get a tense neck/head the hissing volume goes up too.
I'd welcome any thought! Cheers, Steve