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Zeljko Kojadinovic, MD, PhD Neurosurgeon and Pain Management Specialist Last medically reviewed: June 07, 2026 Who this page is for This page is for patients with postherpetic neuralgia (PHN) who continue to have persistent pain despite multiple treatments or medications

The results of only 9 patients were available, because 2 patients did not visit after the referrals

Data Sources : A PubMed search was completed using the key terms vitamin B 12 deficiency and cobalamin deficiency

Hernndez, C., & Rangel, H

Symptom-specific management can provide relief: For headaches: paracetamol (following package instructions) and rest in a quiet, darkened room For nausea: small, frequent meals and ginger tea For sleep disturbance: maintain regular sleep schedules and avoid caffeine after midday For anxiety or restlessness: gentle exercise, relaxation techniques, or mindfulness practices Monitoring and communication with your healthcare team is essential