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>Ramsay Hunt syndrome
Ramsay Hunt syndrome (herpes zoster oticus) occurs when a shingles outbreak affects the facial nerve near one of your ears. In addition to the painful shingles rash, Ramsay Hunt syndrome can cause facial paralysis and hearing loss in the affected ear.
Ramsay Hunt syndrome is caused by the same virus that causes chickenpox. After chickenpox clears up, the virus still lives in your nerves. Years later, it may reactivate. When it does, it can affect your facial nerves.
https://www.mayoclinic.org/diseases-conditions/ramsay-hunt-syndrome/symptoms-causes/syc-20351783
California Sen. Dianne Feinstein suffered complications from shingles that included encephalitis, or inflammation of the brain, and Ramsay Hunt syndrome, her office confirmed on Thursday.
https://abcnews.go.com/Politics/dianne-feinstein-suffered-brain-inflammation-complication-shingles-aide/story?id=99439726