My bb started in 1997. The only thing I can think of that could have caused it was I was having a lot of inner ear probs at the time, like I was always on a plane and had to clear my ears. So I went to alot of specialists, and had a lot of treatments done (none of which ever cured it). But I was on a lot of steriod nasal sprays (flonase, etc.), and different antibiotics/perscriptions. So then the bb started and I still haven't gotten rid of it.