Health encyclopaedia

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Diagnosis of Bell's palsy

Your GP will usually diagnose Bell’s palsy by taking a history of symptoms and by clinical examination.

An electromyography (EMG) test can be carried out to measure the electrical activity of the facial muscles if the diagnosis is in doubt.

If the symptoms are unusual or fail to improve within three weeks an MRI (Magnetic Resonance Imaging or CT (computed tomography) scan may be suggested to eliminate other possible causes of paralysis.

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