How is Bell’s palsy diagnosed?
Your healthcare provider can make a diagnosis based on symptoms. Other conditions, including stroke, sarcoidosis and Lyme disease, can also cause facial paralysis. To rule out those causes, you may have one or more of these tests:
- Blood tests to check for conditions like Lyme disease or sarcoidosis.
- Electromyography (EMG) to measure nerve activity and damage. This test may help your provider predict how quickly you’ll recover.
- Magnetic resonance imaging (MRI) or computed tomography (CT) scans to rule out stroke or other causes of nerve damage.