Contents
How to Diagnose Postherpetic Neuralgia Like a Pro
Published: May 02, 2024
Diagnosing postherpetic neuralgia (PHN) can be straightforward if you know what to look for. Follow these steps to ensure an accurate diagnosis.
Identify Persistent Pain
The primary indicator of PHN is pain that persists for more than three months in the same area as a previous shingles rash. Document whether the pain is burning, stabbing, or sensitive to touch (allodynia), as these are key symptoms.
Confirm Shingles History
Ensure there was a prior episode of shingles, characterized by a rash and acute pain. In cases without a noted rash, consider the possibility of 'zoster sine herpete,' where the virus reactivates without an obvious rash.
Exclude Other Conditions
Use MRI scans to rule out other conditions like trigeminal neuropathy or diabetic neuropathy. A careful review of symptoms and medical history can help differentiate PHN from similar conditions.
Frequently Asked Questions
Persistent pain in an area previously affected by shingles.
Yes, it's called 'zoster sine herpete.'
MRI scans and medical history are key for confirmation.
Key Takeaways
Are you equipped to accurately diagnose PHN?
References
- Johnson RW, Rice AS. Clinical practice. Postherpetic neuralgia. N Engl J Med 2014; 371:1526.
- Nalamachu S, Morley-Forster P. Diagnosing and managing postherpetic neuralgia. Drugs Aging 2012; 29:863.
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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