Notalgia paresthetica

Notalgia paresthetica
Other names	Notalgia paraesthetica
Notalgia Paresthetica
Specialty	Neurology

Notalgia paresthetica or Notalgia paraesthetica (NP) (also known as "Hereditary localized pruritus", "Posterior pigmented pruritic patch", and "

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 nerves arising in T2 through T6 are unique in that they pursue a right-angle course through the multifidus spinae muscle, and this particular circumstance may predispose them to harm from otherwise innocuous insults of a varied nature." Patients may have other conditions that predispose them to peripheral neuropathies (nerve damage).^{[citation needed]}

The causes of this condition have not yet been completely defined.^[3] Patients are usually older persons.^[4]

Notalgia paresthetica

Diagnosis

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DDx ^[5]

Treatment

Therapy for notalgia paresthetica is directed at controlling symptoms, as no cure exists for the condition. Available treatments include local anesthetics, topical capsaicin,^[6][7] topical corticosteroids,^[8] hydroxyzine, oxcarbazepine, palmitoylethanolamide and gabapentin. Paravertebral nerve block and botulinum toxin injections may also be helpful.

Some patients treated with low concentration topical capsaicin reported pain, burning, or tingling sensations with treatment, and symptoms returned within a month of ceasing treatment.^[9] Oxcarbazepine was reported to reduce the severity of symptoms in a few cases.^[10] One patient has been treated with "paravertebral nerve blocks, with bupivacaine and methylprednisolone acetate injected into the T3–T4 and T5–T6 intervertebral spaces" ^[11] Hydroxyzine has also been used with considerable success in some cases as long as the pills are used daily.

High concentration topical capsaicin (8%,

Most recently intradermal injections of botulinum toxin type A (Botox) have been tried with some success. Even though botulinum normally wears off in three to six months, the treatment appears to be long term, and it has been theorised that botulinum type A effects lasting change in pain signaling.^[15] Unfortunately, repeated injections have been associated with diminished movement ability of the upper back and arms and its recommendation as a treatment has therefore become less popular.^{[citation needed]}

See also

• List of cutaneous conditions
• Hereditary neuralgic amyotrophy

References