Denim,
I do wake up with numbness in my hands, mainly - rarely, it travels to the arms. I think, however, that it could be positional in nature and related to carpal tunnel. So I am not at all sure what would cause the same thing in the tongue and face. Sorry I couldn't be more help. I don't think it is something I would ignore, though. Hopefully you'll get some other posts on this.
Good Luck!
diagnoses: mono 1972; postviral CFS 1997; fibro 1998; CEBV 2005; UCTD (dx limbo) 2007
meds: occasional low dose xanax for sleep, artificial tears w/ ointment at night, ibuprophin (none of which manages the problems very well!)
We cannot avoid the birds of sadness flying over our heads, but we need not let them make nests in our hair.
~~ Chinese saying as quoted by Helen Nearing