Linked to other issues - I'm wondering about that. I get checked frequently (blood work, etc.) by my doc, the companies health program, wife's employer's health program, and all along nothing - no problems. Except for screwing up my back with a couple of hard falls. I *did* have scarlet fever long ago - perhaps that's the source of my tinnitus. Even if the cause was identified the knowledge of where it came from won't be providing the cure. There isn't a day that goes by where I don't wish it would stop.