Diagnosing Bell's Palsy: What Tests Should You Expect?
Published: Aug 16, 2024
Diagnosing Bell's palsy involves a combination of physical examination and, sometimes, specialized tests. Understanding this process can help you feel more prepared and less anxious.
Contents
The Initial Examination
The first step in diagnosing Bell's palsy is a thorough physical examination. Your doctor will ask you to perform various facial movements, like raising your eyebrows, closing your eyes, and smiling. They'll also check for other symptoms like changes in taste or hearing. This exam is like a facial obstacle course, designed to reveal any weaknesses or abnormalities in your facial muscles.
Ruling Out Other Conditions
Because other conditions can mimic Bell's palsy, your doctor may order additional tests to rule them out. These might include blood tests to check for infections or diabetes, or imaging studies like MRI or CT scans to look for tumors or stroke. It's like being a detective, gathering clues to solve the mystery of your symptoms.

Specialized Tests
In some cases, your doctor might recommend electromyography (EMG) or nerve conduction studies. These tests measure the electrical activity in your facial muscles and nerves. They can help determine the extent of nerve damage and predict your recovery. Think of it as a way to 'listen' to your nerves and muscles, understanding how well they're communicating.
When Additional Testing is Needed
If your symptoms are severe, persist for a long time, or if you have other neurological symptoms, your doctor might recommend additional testing. This could include a lumbar puncture (spinal tap) to check for infections or inflammatory conditions. While uncommon, these tests ensure nothing serious is missed.
Frequently Asked Questions
No, diagnosis is primarily based on symptoms and examination.
Not always, but they may be done to rule out other conditions.
Often, it can be diagnosed in a single doctor's visit.
Not usually, but your doctor may refer you if needed.
Most tests are painless, but some may cause mild discomfort.
The Bottom Line
While the diagnostic process for Bell's palsy can seem complex, it's designed to ensure accurate diagnosis and appropriate treatment.
References
- Gilden DH. Clinical practice. Bell's Palsy. N Engl J Med 2004; 351:1323.
- Holland NJ, Weiner GM. Recent developments in Bell's palsy. BMJ 2004; 329:553.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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