I just spoke to my otologist. He said in my case it was caused by the valsalva maneuver, overdoing it, although my tubes are compromised already they never caused any of this. He said no imaging will really determine the exact problem and doesn't think it necessary. He also said making a small hole in the eardrum to release any fluid that might exist can be done as well as placing tubes BUT: he told me this condition will CLEAR UP ON ITS OWN in time. I'd rather do that than make incisions and have tubes, etc. I'd rather wait. I'm seeing him next week. I know you asked for an update, this is it, no imaging, etc., so far anyway.