What causes Bell's palsy?

[bluez]

My mom was diagnosed with Bell's Palsy. They have ruled out all the obvious causes except Lyme's disease. They ran tests and took 3 tubes of blood, and said they were performing 3 separate tests. One of which is Lyme's, and the other 2, they wouldn't tell her what they were for, they just said they would cross that bridge when we get to it. Does anyone know what those tests could have been, I'm assuming they aren't good, because he said to hope that it is Lyme's. And if it's not lyme's, is there a possibility that there just isn't a cause, it just happened?? Any information would be greatly appreciated, she has to wait a week for results and I'm curios.

[Jordan]

My mother had it too, and the doctor said STRESS. If you dont catch it in time, it will be permanent. They will use a type of sterroid, and the "stroke" effect will go away slowly.

[JellyBean]

Bell's is associated with the virus that causes chicken pox and shingles.