http://www.bellspalsy.ws/

I'm sorry this has happened to you! It isn't permanent, no. I had a good friend/deacon who got this... we made good fun of it for a bit (he did with the rest of the church) and then it was oh well... and it did correct itself.

Nerves take a long time to heal themselves, so it depends upon what happened and how much was traumatized (the nerve) as to how long it will take.