Re: Progressive weakening of facial muscles
No self respecting physcian will take this lightly. It could be a sign of a serious disorder, you should see a neurologist right away.
It might be something as simple as a pinched nerve or nerve damage from a virus you had years ago . . . Or it could be a slow growing tumor putting pressure on one of the crainal nerves or damage from a stroke you never even knew you had.
I don't mean to spook you. 9 times out of 10, when there are no other symptoms, it's a just pinched or damaged nerve - but you should see someone to make sure.