It occurred during a 3 day concert in July. Affects mostly my left ear. This is what happened next... 1.For several months was slight ringing but didn't effect my day to day life and I could still ignore it to sleep. It did annoy me but it wasn't "life changing bad" 2. Early November I had a dentist appointment to fill cavities in my my lower left mouth. #17 and #18 My tinnitus was progressively getting a bit worse but it seems after the dental work was when it really got bad. Just wonder how much of the blame was on the dental work. I know this is just a "best guess' type question but still looking forward to some thoughts from you guys.