Left hand onycholysis: ring and little fingers affected
Classification and external resources
Specialty dermatology
ICD-10 L60.1
ICD-9-CM 703.8
DiseasesDB 9236
MeSH D054039

Onycholysis /ˌɒnˈkɒlɪsɪs/ refers to the detachment of the nail from the nail bed, usually starting at the tip and/or sides.[1] On the hands, it is said to occur particularly on the ring finger but can occur on any of the fingernails. It may also happen to toenails.

Onycholysis can occur in many conditions, including psoriasis.[2] In thyrotoxicosis it is thought to be due to sympathetic overactivity.[3] It may also be seen in infections or trauma.[4]


Onycho-, from Ancient Greek ónuks, meaning nail, and Ancient Greek lúsis, meaning a loosening.


See also


  1. Freedberg; et al. (2003). Fitzpatrick's Dermatology in General Medicine (6th ed.). McGraw-Hill. p. 660. ISBN 0-07-138076-0.
  2. Dennis, Mark; Bowen, William Talbot; Cho, Lucy (2012). "Onycholysis (Plummer's nail)". Mechanisms of Clinical Signs. Elsevier. p. 542. ISBN 978-0729540759; pbk
  3. Talley&O'Connor (2006). Clinical Examination A Systematic Guide to Physical Diagnosis (5th ed.). Elsevier. p. 262. ISBN 0-7295-3762-5.
  4. Weber&Kelley (2010). Health Assessment in Nursing (4th ed.). Wolters Kluwer Health and Lippincott, Williams & Wilkins. p. 193. ISBN 978-0-7817-8160-2.
  5. Hazin, Ribhi; Tamimi, Tarek I. Abu-Rajab; Abuzetun, Jamil Y.; Zein, Nizar N. (October 2009). "Recognizing and treating cutaneous signs of liver disease". Cleveland Clinic Journal of Medicine. 76 (10): 599–606. doi:10.3949/ccjm.76A.08113. ISSN 0891-1150. PMID 19797460.

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