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Facial paralysis - Definition


Facial paralysis involves a damaged facial nerve, where the nerve is no longer able to control the different facial muscles, such as those located under the cheeks or that enable us to smile or make any other facial expression. The face consequently remains inert. Depending on which part of the nerve is affected, all or only one group of the facial muscles can be paralyzed. There are a great number of causes of facial paralysis, including a tumor applying pressure on the nerve, infection, inflammatory disease, trauma, and so on. One sudden-onset type of facial paralysis is called frigore paralysis, which is the most common type. Its underlying cause is unknown, but its progression is benign, with no manifestation for several weeks. Treatment methods for paralysis are selected based on the underlying cause.