You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Ramsay Hunt syndrome is caused by infection of: and explain in detail?
Varicella zoster virus may also cause facial nerve paralysis when the virus reactivates from dormancy in the nerve. This condition, known as Ramsay Hunt syndrome, is characterized by severe otalgia followed by the eruption of vesicles of the external ear. Treatment is similar to Bell's palsy, but full recovery is only seen in approximately two thirds of cases. Ref: Schwaz's principle of surgery 9th edition, chapter 18.