Sympathetic nerve blocks in mandibular herpes zoster and postherpetic neuralgia.

Sympathetic blocks have been indicated for the diagnosis and treatment of painful neuropathic conditions, such as herpes zoster (HZ) and postherpetic neuralgia (PHN). The purpose of this article is to report a case of mandibular HZ and PHN in an HIV-positive patient, and discuss the efficacy of sympathetic nerve blocks for pain relief and prevention of PHN.