 Other research, however, identified, out of a total of 176 cases diagnosed as Bell's palsy, HSV-1 in 31 cases (18 percent) and herpes zoster in 45 cases (26 percent).In addition, HSV-1 infection is associated with demyelination of nerves.This nerve damage mechanism is different from the above-mentioned—that edema, swelling and compression of the nerve in the narrow bone canal is responsible for nerve damage.