February 2009 in “Springer eBooks” Pregnancy can cause more body and scalp hair growth and make nails brittle, but these changes often revert after giving birth.
September 2023 in “UCrea (University of Cantabria)” Nails are essential for fingertip regeneration.
4 citations
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November 2009 in “Medical Clinics of North America” Stress, nutritional issues, and chronic diseases can cause hair loss, and nail changes may signal internal diseases; treatment focuses on the underlying cause.
The nail immune system is similar to hair but different from skin, with fewer immune markers.
6 citations
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May 2024 in “Developmental Biology”
November 2021 in “Egyptian Journal of Medical Microbiology” COVID-19 protective measures led to skin irritation, hair loss, and brittle nails; using skin-friendly products and a healthy diet is recommended.
6 citations
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February 2015 in “Dermatologic Surgery” The document concludes that a new training model could improve dermatology residents' skills in nail procedures and lead to more nail cases being treated by dermatologists.
Hair and nail disorders can harm self-esteem, but early treatment helps.
April 2011 in “www.virtualization.info” Early diagnosis of trachyonychia improves treatment and reduces psychological and cosmetic issues.
17 citations
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January 2013 in “Journal of Cutaneous Pathology” The onychodermis helps anchor the nail bed and may aid in nail formation.
February 2023 in “International Journal of Dermatology” April 2025 in “Revista Digital de Postgrado” Severe malnutrition in young children causes various skin and nail issues, mainly pigmentation changes and extreme thinness.
July 2021 in “PARIPEX INDIAN JOURNAL OF RESEARCH” Knuckle darkening can be an early sign of vitamin B12 deficiency.
April 2024 in “Journal of cosmetic dermatology” Aging changes the red part of lips, affecting life quality and sparking cosmetic interest.
21 citations
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April 2004 in “Australasian Journal of Dermatology” A 3-year-old girl has a rare condition causing sparse hair and nail issues, with minimal improvement from treatment.
January 2026 in “Advances in Dermatology and Allergology” Alopecia areata may be linked to changes in small blood vessels.
June 1997 in “Australasian Journal of Dermatology” Researchers found new hair and nail genes, how hair reacts to UV, differences in white and pigmented hair growth, nerve changes in alopecia, treatments for baldness and alopecia, a toenail condition linked to a genetic disorder, and that nail fungus is more common in people with psoriasis.
December 2021 in “Australasian Journal of Dermatology” Red stripes on nails and hair loss may occur after COVID-19.
10 citations
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May 1994 in “Journal of Investigative Dermatology”
10 citations
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July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Human nails and hair follicles have similar gene activity, especially in the cells that contribute to their growth and development.
119 citations
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January 2000 in “British Journal of Dermatology” Different parts of the nail express different keratins, showing unique patterns of differentiation.
Nail stem cells help nail and finger regeneration through BMP signaling.
22 citations
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October 2007 in “Journal of Investigative Dermatology” Stem cells in mouse nails are found in the nail matrix and may control nail growth.
July 2014 in “Acupuncture & electro-therapeutics research” Visible and invisible changes on the face and hands can indicate heart problems, and manual hand stimulation can relieve chest pain.
August 2023 in “Journal of the European Academy of Dermatology and Venereology” Onycholemmal horn is a rare nail tumor in elderly women, treated by surgical removal.
December 2024 in “Nutrients” Skin, hair, and nail changes can help detect eating disorders early.
September 2022 in “JAAD case reports” The man has a genetic skin condition called pachyonychia congenita.
17 citations
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January 2015 in “International Journal of Trichology” Frontal fibrosing alopecia may affect nails and could be a type of lichen planus, treatable with certain medications.
1 citations
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November 2022 in “Anais Brasileiros de Dermatologia” Many hospitalized children with COVID-19 had skin, mouth, or nail changes, with skin rashes being common.
January 2006 in “Dianzi xianwei xuebao” Netherton syndrome causes specific skin and hair changes that help in early diagnosis.