Onychoschizia
Clinical
Features
Variants
Images
Differential
Histology
Features
Variants
Images
Differential
Pathophysiology
Epidemiology
Associations
Workup
Labs
Imaging
Diagnostic criteria
Management
Treatment
Monitoring
Counseling
Other considerations
Onychoschizia, also known as nail splitting and brittle nails, is a splitting of the free-edged tip of the nail.[1] There is also often a longitudinal split in addition to the separation of keratin layers.[2]
Cause
Frequent hand-washing is the usual cause, but it is also part of normal ageing.[3] Manicures, nail polish and remover, nail biting, and repeated trauma such as typing, can contribute to nail splitting.[1] Dehydration likely plays a role.[3] Nutritional deficiencies that can result in nail splitting include iron, selenium, and zinc.[1] Some skin diseases such as psoriasis and lichen planus may feature such nails.[3]
Diagnosis
Diagnosis is by its appearance, but sometimes blood tests are required to look for iron deficiency, thyroid problems, and kidney problems.[1]
Treatment
Treatment is by discontinuing nail polish and applying moisturiser.[2] An acceptable alternative is gel nails.[2] Some favourable response has been reported with biotin if the person is deficient in vitamin B7.[1] It is not routinely given.[1]
Epidemiology
It is common among women and occurs in almost a third of newborns.[2]
Other animals
It also occurs in hooved animals such as horses.[4]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Sloan, Brett (2022). "16. Multiple nail: nail splitting". In Waldman, Reid A.; Grant-Kels, Jane M. (eds.). Dermatology for the Primary Care Provider. Philadelphia: Elsevier. pp. 277–278. ISBN 978-0-323-71236-1.
- ↑ 2.0 2.1 2.2 2.3 James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "33. Diseases of the skin appendages". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. p. 785. ISBN 978-0-323-54753-6.
- ↑ 3.0 3.1 3.2 Johnstone, Ronald B. (2017). "2. Diagnostic clues and "need-to-know" items". Weedon's Skin Pathology Essentials (2nd ed.). Elsevier. p. 31. ISBN 978-0-7020-6830-0.
- ↑ Colombo, Victor E.; Gerber, Françoise; Bronhofer, Max; Floersheim, George L. (December 1990). "Treatment of brittle fingernails and onychoschizia with biotin: Scanning electron microscopy". Journal of the American Academy of Dermatology. 23 (6): 1127–1132. doi:10.1016/0190-9622(90)70345-i. PMID 2273113.
