September 2024 in “The Journal of Dermatology” Nevus comedonicus can sometimes grow terminal hair, challenging previous beliefs.
June 2022 in “IP Indian journal of clinical and experimental dermatology” A woman had a rare, non-cancerous skin growth on her face, which was removed and did not come back after a year.
39 citations
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March 2009 in “Dermatology Online Journal” Erlotinib can cause persistent excessive hair growth.
December 2001 in “中華皮膚科醫學雜誌” An 18-year-old boy had a harmless skin nodule near his nose with hair and oil glands inside.
November 2022 in “Journal of Investigative Dermatology” Activating a bitter taste receptor in hair follicles can stop hair growth by increasing a specific growth factor.
17 citations
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March 2005 in “Journal of Investigative Dermatology” Autofluorescence in hair follicle stem cells can interfere with studies but may help isolate these cells.
11 citations
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February 1980 in “BMJ. British medical journal” Hirsutism is common body hair growth due to genetics and hormones, and while not a disease, it can be distressing; virilisation includes hirsutism with other male traits and needs medical attention.
February 2013 in “Journal of the American Academy of Dermatology” Certain gene variations may increase the risk of alopecia, and platelet-rich plasma treatment can improve hair density in those with hair loss; a rare case of facial Becker's nevus was linked to uneven beard growth.
949 citations
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January 2001 in “Cell” Adult mouse skin contains stem cells that can create new hair, skin, and oil glands.
14 citations
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June 2005 in “PubMed” A rare ear cyst contained hair fragments.
20 citations
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October 1996 in “Journal of the American Academy of Dermatology” January 2010 in “프로그램북(구 초록집)” 1279 citations
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November 2005 in “Nature Medicine”
8 citations
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November 2020 in “Nature Communications” Adult stem cells with Tp63 can form hair and skin cells when placed in new skin, showing they have hidden abilities for skin repair.
January 1996 in “Springer eBooks” 96 citations
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December 1995 in “Journal of Investigative Dermatology”
January 1994 in “JAPANESE JOURNAL OF CLINICAL PHARMACOLOGY AND THERAPEUTICS” Testosterone and fleece-flower root affect mouse hair growth.
73 citations
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July 1956 in “Journal of Investigative Dermatology” Adult human skin can grow new fine hair follicles after a deep exfoliation treatment.
77 citations
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March 2021 in “Nature” Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.
October 2012 in “한국미용학회지” Tremella fuciformis Berk helps protect hair growth from stress effects.
July 2024 in “Journal of Investigative Dermatology” 8 citations
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July 2004 in “Journal of morphology” Marsupial hair structure and keratin distribution are similar to placental mammals.
8 citations
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July 2014 in “Anais Brasileiros de Dermatologia” A man's scalp condition was misidentified as hair loss dots but was actually a common follicular disorder.
September 2025 in “JID Innovations” Squaric acid dibutylester promotes hair growth by activating immune cells, especially macrophages.
2 citations
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March 1989 in “International Journal of Dermatology”
12 citations
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February 2010 in “Journal of The American Academy of Dermatology” A cancer drug caused unusual hair growth on a 100-year-old man's scalp and eyelashes.
January 2021 in “Institutional Repositories DataBase (IRDB)”
10 citations
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July 2019 in “Facial Plastic Surgery Clinics of North America” Facial hair transplantation has improved to give natural-looking beards and eyebrows with proper technique and patient care.
20 citations
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February 2010 in “Journal of Investigative Dermatology” Slug (Snai2) helps regulate hair growth timing in mice.