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Postherpetic neuralgia (PHN) is neuropathic pain that occurs due to damage to a peripheral nerve caused by the reactivation of the varicella zoster virus (herpes zoster, also known as shingles). Typically, the nerve pain (neuralgia) is confined to an area of skin innervated by a single sensory nerve, which is known as a dermatome. PHN is ...
Postherpetic neuralgia can sometimes occur due to nerve damage (5). The causative agent for shingles is the varicella zoster virus (VZV)—a double-stranded DNA virus related to the herpes simplex virus. Most individuals are infected with this virus as children which causes an episode of chickenpox.
The causes of this condition have not yet been completely defined. [3] Patients are usually older persons. [4] The correlation of notalgia paresthetica localization with corresponding degenerative changes in the spine suggests that spinal nerve impingement may be a contributing cause. According to Plete and Massey, "The posterior rami of spinal ...
A rash is essentially inflammation in the skin that can be caused by either an external exposure or an internal factor,” says Joshua Zeichner, M.D., director of cosmetic and clinical research in ...
The briefest electric shock type of paresthesia can be caused by tweaking the ulnar nerve near the elbow; this phenomenon is colloquially known as bumping one's "funny bone". Similar brief shocks can be experienced when any other nerve is tweaked (e.g. a pinched neck nerve may cause a brief shock-like paresthesia toward the scalp).
Optic nerve damage could cause or contribute to vision loss (including retinitis pigmentosa). ... Common symptoms of allergic reaction include hives, rash, swelling of the lips, throat, and tongue ...