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Ridging (nail, longitudinal)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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This may often be mistaken for a fungal infection.

Causes of longitudinal ridging include:

  • alopecia areata,
  • lichen planus,
  • rheumatoid arthritis
  • and peripheral circulatory disorders


  • Williams I, Ankrett V (1996). Nail disorders. Update, 546-51.

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