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Onychomadesis is a periodic idiopathic shedding of the nails beginning at the proximal end, possibly caused by the temporary arrest of the function of the nail matrix.[1]:784[2]:660 One cause in children is hand, foot, and mouth disease.[3] This generally resolves without complication.

Onychomadesis can also occur if the nail is damaged or suffers a loss of blood supply; for example, due to a bruise. The nailbed turns black, and the nail drops off shortly afterwards. It takes around 6 to 12 months to regrow.

See also[edit]


  1. ^ James WD, Berger TG, Elston DM (2006). Andrew's diseases of the skin: clinical dermatology (10th ed.). Philadelphia: Saunders Elsevier. ISBN 978-0-8089-2351-0.
  2. ^ Freedberg IM, Fitzpatrick TB (2003). Fitzpatrick's dermatology in general medicine (6th ed.). New York, NY: McGraw-Hill. ISBN 978-0-07-138076-8.
  3. ^ Bernier V, Labrèze C, Bury F, Taïeb A (November 2001). "Nail matrix arrest in the course of hand, foot and mouth disease". European Journal of Pediatrics. 160 (11): 649–51. doi:10.1007/s004310100815. PMID 11760019.