Skip to main content

  • What Causes Bell's Palsy?

    Published Mar. 01, 2017

    Generally, it is not known what causes Bell’s palsy. However, doctors believe it may be due to one or more of these problems:

    • problems in your body’s immune system (how it fights disease)
    • reduced blood flow to a nerve that goes to your face (the 7th cranial nerve)
    • infection from a virus, causing swelling of the facial nerves