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13. CRANIAL NEURALGIAS AND CENTRAL CAUSES OF FACIAL PAIN 13.1. Trigeminal neuralgia 13.2. Glossopharyngeal neuralgia 13.3. Nervus intermedius neuralgia [G51.80] 13.4. Superior laryngeal neuralgia [G52.20] 13.5. Nasociliary neuralgia [G52.80] 13.6. Supraorbital neuralgia [G52.80] 13.7. Other terminal branch neuralgias [G52.80] 13.8. Occipital neuralgia [G52.80] 13.9. Neck-tongue syndrome 13.10. External compression headache 13.11. Cold-stimulus headache 13.12. Constant pain caused by compression, irritation or distortion of cranial nerves or upper cervical roots by structural lesions [G53.8] + [code to specify aetiology] 13.13. Optic neuritis [H46]  13.14. Ocular diabetic neuropathy [E10-E14]  13.15. Head or facial pain attributed to herpes zoster 13.15.1. Head or facial pain attributed to acute herpes zoster [B02.2]  13.15.2. Post-herpetic neuralgia [B02.2] 13.16. Tolosa-Hunt syndrome 13.17. Ophthalmoplegic “migraine” 13.18. Central causes of facial pain 13.19. Other cranial neuralgia or other centrally-mediated facial pain [code to specify aetiology] Bibliography and reference14. OTHER HEADACHE, CRANIAL NEURALGIA, CENTRAL OR PRIMARY FACIAL PAIN 

IHS	Diagnosis	ICD-10
13.15.2	Post-herpetic neuralgia [B02.2]	G44.847

Description:

Facial pain persisting or recurring ≥3 months after the onset of herpes zoster.

Diagnostic criteria:

Head or facial pain in the distribution of a nerve or nerve division
Herpetic eruption in the territory of the same nerve
Pain preceded herpetic eruption by <7 days
Pain persists after 3 months

Comment:

Post-herpetic neuralgia is more often a sequel of herpes zoster as age advances, afflicting 50% of patients contracting zoster over the age of 60 years. Hypaesthesia or hyperalgesia and/or allodynia are usually present in the territory involved.

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IHS vs. ICD-10

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