Wow Ceppo, for a while there I thought I was the only person on the planet that could do that! Ever feel like a freak....? I notice that I have to keep putting my fingers over my nose and blowing hard to unblock them because my hearing is inferior unless I do this. My GP says it is fluid in the inner ear canal and prescribed de-congestants to clear me of this problem. Well this never worked and I've grown tired of going back to the docs surgery to be told the same thing everytime.
I've noticed I have to un-block them mainly after food and drink as well as in the Cessna at a thousand feet feet or less.
It annoys me more than anything, but if there is a serious risk of permanent injury to my ears then I would like to know.
Sorry I couldn't shed any light on this problem but I passed the Class 1 with it, all the CAA said was that there was some scaring but this was acceptable. The scaring is most likely from the grommits I had put in as a child-at least that is what they and my GP think.
Hope someone can shed some more light on this.
Good luck, VFE.