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Nummular Headache (previously Coin-shaped cephalgia)

Description: There is pain in a small circumscribed area of the head in the absence of any lesion of the underlying structures. Nummular headache is probably a localised terminal branch neuralgia of the trigeminal nerve.The painful area may be localised in any part of the head but is usually in the parietal region. Possible inflammation or irritation of the cutaneous nerves of the scalp may be the cause.The pain remains confined to the same symptomatic area which does not change in shape or size over time.

Diagnostic criteria:

  1. Mild to moderate head pain.
  2. Pain is felt exclusively in a rounded or elliptical area typically 2-6 cm in diameter
  3. Pain is chronic and either continuous or interrupted by spontaneous remissions lasting weeks to months
  4. Not attributed to another disorder

There is a slight female preponderance.

Lancinating exacerbations lasting for several seconds or gradually increasing over 10 minutes to 2 hours may be superimposed on the base-line pain. During and between symptomatic periods, the affected area may show variable combinations of hypaesthesia, dysaesthesia, paraesthesia, tenderness and/or discomfort.

Spontaneous periods of remission have been observed in 38% of patients, with return to continuous pain after weeks or months.

References
1. The International Headache Society. The International Classification of Headache Disorders, 2nd edition. Written 2004. http://216.25.100.131/ihscommon/guidelines/pdfs/ihc_II_main_no_print.pdf
2. Nummular Headache: a prospective study of 14 new cases.Written 2004. Accessed August, 2008. http://www.ncbi.nlm.nih.gov/pubmed/15186307

If the above link for (1) does not work go here http://www.teethremoval.com/ihc_II_main_no_print.pdf

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