I stayed in hospital for 3 days in hopes of finding the cause of my tinnitus. Among the tests I had were: - blood tests - hearing test - tympanometry - tinnitus loudness/tone matching - videonystagmography - spine RTG The last one revealed that I have lordosis. One doctor I talked with said this is a possible scenario - strained muscles in my neck partially block the bloodflow to my head, causing tinnitus and occasionally other symptoms like dizziness and headache. I need to undergo some physical therapy to treat my neck. Generally doctors here are kinda optimistic - while they say tinnitus is a complex condition, they say it's mostly treatable... I'm not saying I am sure this will help me, but for some of you who still don't know why do you have T, maybe give a suggestion to your doctor about possible spine problem. Might be worth checking out.