Anyone have this issue?
I have had it sporadically. This technique seems to work: hold your hands out in front of you. Cross your middle fingers over your index fingers, making an "L" with each thumb (spread).
Holding your thumbs out in this manner, insert your thumbs gently in each respective ear, and rotate your hands backwards - elbows out, so that your crossed fingers rest just above the base of your skull, at the hairline.
At this point, I must swear that I am not making this up.
Now, what you are going to do is snap your middle fingers forward against the back of your head - again with your thumbs inserted in your ears. You'll hear it inside your head as a "thump". Do this ten times at an interval of about one second for each snap. Then, do it once more.
Remove your fingers from your ears. If it worked, the ringing will be gone.
I would suggest you do this at home while sitting on the edge of the bed, and without anyone around to witness how funny it looks.
But it has worked for me, and as Elizabeth Warren might add:
Honest Injun.