January 2021 in “Dermatology online journal” One twin girl has Loose anagen syndrome with poorly anchored hair, diagnosed with a simple hair pull test, while her identical twin does not have the condition.
January 2020 in “Columbia Academic Commons (Columbia University)” Certain genetic changes in the STX17 and KRT82 genes contribute to hair loss in alopecia areata.
January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.
Basal cell carcinoma behaves like hair follicles and targeting specific pathways may help treat it.
November 2011 in “Informa Healthcare eBooks” Environmental, chemical, mechanical, and personal health factors can all damage hair and contribute to hair loss or changes in hair quality.
September 1978 in “PubMed” Chondroitin sulphate is more abundant than hyaluronic acid in skin and hair samples, except in gamma-keratosis.
January 2026 in “Zenodo (CERN European Organization for Nuclear Research)” The polyherbal shampoo effectively treats dandruff and is a safe, natural option.
January 2026 in “Zenodo (CERN European Organization for Nuclear Research)” The polyherbal shampoo effectively treats dandruff and is a safe, natural option.
February 2021 in “PubMed” A 2-year-old girl had a hair disorder not shared by her identical twin.
4 citations
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May 2017 in “Pediatric Dermatology” The study found that Short Anagen Syndrome results in short hair growth not due to hair fragility, and hair may grow longer after puberty.
July 2023 in “Cosmoderma” 19 citations
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July 2004 in “Australasian Journal of Dermatology” Her hair grew back normally after she stopped rubbing it.
13 citations
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February 1980 in “Journal of Cutaneous Pathology” Rubbing seborrheic keratoses causes specific skin changes and may link them to hair follicles.
Hair feels different when touched and rubs together in various ways.
11 citations
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January 1977 in “Archives of dermatological research” Mouse tail skin has different keratinization near hair follicles and scales.
59 citations
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August 1981 in “PubMed” Trichilemmal keratinization is a unique process in hair follicles where the outer root sheath turns into keratin without a specific layer.
6 citations
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January 2000 in “Dermatology” A girl's severely tangled hair couldn't be fixed and had to be cut due to a rare condition called plica neuropathica.
1 citations
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July 1935 in “Nature” Animal hair can curl tightly on its own, especially in foxes, due to changes in keratin.
31 citations
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November 2016 in “Cell Reports” Touch sensitivity in mouse skin decreases during hair growth due to changes in touch receptors.
March 2026 in “Indian Journal of Dermatopathology and Diagnostic Dermatology” Corkscrew hairs can help diagnose trichotillomania.
April 2018 in “Journal of Investigative Dermatology” The keratin network in mouse skin changes during cornification and affects the skin's protective barrier.
A runner developed tangled armpit hairs from shirt friction, preventable by shaving or wearing smooth shirts.
4 citations
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August 2023 in “Nature Communications” Mouse zigzag hair bends form due to a 3-day cycle of changes in hair progenitors and their environment.
26 citations
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February 1991 in “PubMed” Trichotillomania can be identified by a "Friar Tuck sign" and nail-biting.
26 citations
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August 2007 in “Annals of Anatomy - Anatomischer Anzeiger” Feathers become harder as they develop due to a change in keratin type.
1 citations
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March 2023 in “Tidsskrift for Den norske lægeforening” Keratosis pilaris is a common skin condition causing a bumpy texture, sometimes linked to other diseases, with various treatments available.
8 citations
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May 2005 in “The American journal of dermatopathology/American journal of dermatopathology” The hair defect is due to abnormal inner root sheath keratinization.
28 citations
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June 1995 in “The Journal of Dermatology” The flaky skin mouse mutation is a natural model for studying human psoriasis.
1 citations
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June 1998 in “Journal of Forestry Research” Mammalian hair scales change from smooth to wavy due to friction.
6 citations
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October 2006 in “International Journal of Dermatology” Hair splitting and nail detachment are linked conditions.