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Complications
By Mayo Clinic staffAlthough a mild case of Bell's palsy normally disappears within a month, recovery from a case involving total paralysis varies. If the damage to your facial nerve is unusually severe, the fibers may be irreversibly damaged. Another complication can arise from misdirected regrowth of nerve fibers, which can result in involuntary contraction of certain muscles when you're trying to move others. For example, when you smile, the eye on the affected side may close.
