If you scroll down from here the next section is called "similar threads". There are several threads about tinnitus. All pretty old.
The first one has 73 posts. Some good discussion going on in that one.
I am one of the few and unfortunate people to have tinnitus shortly after vaping...so I need to know, has anyone out there cured the ringing by switching to juice that contains absolutely no PG? All I have read out there is that people had to end...
www.e-cigarette-forum.com
I skimmed through some of those threads. There does seem to be quite a lot of cases where folks developed tinnitus after they started vaping, and several theories about how it might be related.
But zero evidence behind any of it so far. It could easily just be some propter hoc deal. Hell, I went bald after I started vaping.