I got a diagnosis of an enlarged jugular bulb vein behind the ear drum. The swooshing sound caused by changes in the spinal fluid pressure. I was told I was probably born with this variation and that something happened to cause the sound to begin. For some reason, the sound suddenly stopped about 4 nights ago. I have a theory why, but need to give it more time to see if I am right. I was told there is nothing that can be done. I don't know yet if the sound will return. Keeping my fingers crossed. Good luck with your procedure.