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How is Bell's Palsy Diagnosed?

Bell's palsy diagnosis involves clinical examination to assess facial muscle strength and differentiation from other conditions. Tests such as electromyography, imaging scans, and blood tests help confirm nerve damage and rule out alternative causes of facial paralysis.

  • 12 Feb 2024
  • 2 min read

Bell's palsy causes one side of your face to feel weak or paralyzed temporarily. Doctors use various tests to confirm if what one is suffering from is Bell's palsy and not anything else which looks similar. Early detection of disease matters because doctors can promptly assist and prevent further issues. Understanding how doctors diagnose Bell's palsy is crucial as it ensures receiving timely and suitable treatment. Some of how this disease is diagnosed are mentioned below.

Diagnosis of Bell's palsy:

  • Clinical Examination: Your healthcare provider assesses your facial muscles by instructing you to perform various movements like closing your eyes, lifting your brow, showing your teeth, and frowning. This evaluation helps in observing muscle strength and symmetry. Clinical examination is the first step, which helps one diagnose if what they are suffering from is Bell’s palsy.
  • Differentiation from Other Conditions: Bell's palsy shares symptoms with multiple other conditions such as stroke, infections, Lyme disease, inflammatory conditions, and tumours, all of which can cause facial muscle weakness resembling Bell's palsy. To confirm this disease, doctors use various methods.
  • Electromyography (EMG): This test confirms nerve damage and its extent. It measures muscle's electrical activity in response to stimulation, providing insight into the nature and speed of electrical impulses along the nerve.
  • Imaging Scans (MRI/CT): Magnetic Resonance Imaging (MRI) or Computerized Tomography (CT) scans help rule out potential pressure sources on the facial nerve, like tumours or skull fractures, which might mimic Bell's palsy symptoms.
  • Blood Tests: Bell's Palsy doesn't have a specific blood test. These tests can rule out infections like Lyme disease or other reasons for facial paralysis.
  • Exclusionary Method: Bell's palsy diagnosis is done by excluding other potential causes of facial paralysis. It is done through a mix of an in-depth check-up, EMG, scans, and blood work.

Know somebody showing these signs? These are the diagnostic steps to verify the condition. 

Also read:


Bell’s palsy doesn’t have a clear-cut test. So, how do health pros identify it? They use a broad method, mixing clinical checks and certain tests. This way, they confirm it is Bell's palsy and not a look-alike condition. What starts the process is the doctors scanning your face and asking about your past health. Then, they perform specific tests, finalising whether it's Bell's palsy. Why is this important? Being swift matters! Catching Bell's palsy on time aids improvement and dodges extra problems. Plus, the good news, health insurance often covers these check-ups. Quick, right treatment lends a hand in better healing. Knowing how Bell's palsy is found gives you the power to get the help you need and manage this temporary but challenging condition in the best way possible.

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