causes of bell's palsy face
Viruses that have been linked to Bell's palsy include the virus that causes: 1  Cold sores and genital herpes (herpes simplex) 2  Chickenpox and shingles (herpes zoster) 3  Mononucleosis (Epstein-Barr)  Cytomegalovirus 1  infections. Respiratory illnesses (adenovirus)  German measles 1  (rubella) Mumps (mumps 2  virus) Flu (influenza  B)