I'd like to consider myself an expert since I have had a virus a lot more severe than the one that causes Bell's Palsy. I had Ramsay Hunt Syndrome which is caused by the herpes complex virus. Bell's Palsy is caused by the herpes simplex virus. My sickness was caused by shingles in my ear. I did have facial paralysis for a few months, but had vertigo, dizziness and all that other fun stuff. The dizziness still lingers a year and a half later, it sucks.
But anyways. I use to frequent a message board about the stuff and this is what someone's doctor told them. "I was able to see Lisa Massa, a Duke Physical Therapist who is an expert on facial therapy.
Lisa said that electrical stimulation from a TENS unit is always a DO NOT USE!! The stimulation machines are very expensive, as are the treatments, and they appear from all trials she has heard about, to be a waste of money.
Often the nerves are actually healing and reconnecting correctly, but other nerves and muscles are operating incorrectly, overshadowing the improvements. So, any type of electrical based stimulation procedure should not be used as a treatment for the face."
Also, you should avoid things like acupuncture where they put needles in your nerves. This can cause synkinesis which can cause the nerves in your face to heal incorrectly. It means things can happy like if you yawn and a tear drops from your eye.
My best advice is just give it time and it will heal. Get plenty of rest and sleep. It's only temporary man, just be glad it's not something that is permanent!
Oh yeah, i forgot, this might help... http://www.facialparalysis.net/