For some reason I started getting tinnitus when I am sick with some sort of sinus infection / cold or flu. Usually I don't sleep very well when I'm sick so that might be part of it.

The first time I got sick and it started, I went walking around the neighborhood looking for the source of the noise until I realized I had tinnitus. Sounded like some kind of distant earth works / resonance thing.

Really feel for people who have it permanently.