What conditions increase the risk of having bell's palsy?

Several: People with diabetes have been shown to be at a significantly increased risk for developing bell's palsy - a dysfunction of the facial nerve causing paralysis in one half of the face. Other conditions associated with increased risk of this condition include pregnancy, especially when pre-ecclampsia is present, and possibly autoimmune diseases and infections, particularly viral. Thanks to d. Jones.

None known: Bell's palsy is a condition where there is weakness or paralysis of the facial muscles. It is thought that it might be due to a viral infection. There are no known conditions predisposing someone to bell's palsy nor is there any vaccine or other treatment to prevent it.