No cancer, I had a dural arteriovenous fistula in brain located near my right ear. That was creating the turbulent blood flow which had me hearing the whooshing 24-7. And yes it was always worse at night. I actually got the idea from that whooshers.com and finally my doc referred me to a neurosurgeon. They tried embolization, but it came right back so my only other option was radiation. It took me a year to work up the nerve for that…but so glad I did. Every day I relish in the silence!!