Loss of nerve action: Bell's palsy is from dysfunction of the seventh cranial nerve which activates the muscles of the face. It usually occurs suddenly, rarely has pain, but causes the eyelids, facial side and mouth to droop. Most are self limited but can take up to 6 months to improve. A few last and need surgery to correct the changes in the eye and the eating problems from the droopy mouth.
Answered 2/12/2019
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