The facial nerve is located in the skull and is the engine of skin muscles of the face and neck, and reaches the muscles of the small bones of the ear, with the exception of internal muscle innervated by the trigeminal hammer. The sensory fibers are related to a part of the ear, the ear canal, tympanic membrane and sensory taste fibers from the anterior thirds of the tongue. The most common causes of having a unilateral facial pathology are suddenly facial paralysis and stroke. In the case of paralysis of such nerve can occur in isolation by localized as a tumor, which puts pressure on the nerve injury. The other form of suffering paralysis is due to HIV infection, sarcoidosis, Lyme disease or unknown cause.