Androgenetic alopecia, or hair loss, is caused by a mix of genetics, hormones, and environment, where testosterone affects hair growth and causes hair to become smaller and grow for a shorter time.
October 2025 in “Nature Reviews Disease Primers” October 2025 in “Nature Reviews Disease Primers”
19 citations
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January 2013 in “International journal of medical sciences” Increasing Wnt5a in mice skin delays hair growth but doesn't stop it.
June 2025 in “V F Snegirev Archives of Obstetrics and Gynecology” A six-year-old girl has early signs of puberty, needs no treatment, but requires regular check-ups for future health risks.
9 citations
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March 2019 in “Scientific reports” Temporary ROS production in cultured human hair follicles promotes growth and stem cell activation.
51 citations
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November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Beard cells, unlike scalp cells, produce growth factors in response to testosterone, which may explain differences in hair growth.
25 citations
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October 1975 in “Journal of Cutaneous Pathology” Hair growth in alopecia areata is hindered due to impaired cell activity in the surrounding tissue.
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July 2017 in “Case Reports” Hair loss, known as androgenic alopecia, can start in teenage years and may not always be hormone-related. It's important to do extra tests in young cases and remember it can greatly affect a teenager's mental health.
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April 2002 in “Medical Hypotheses” Hormones cause hair loss by affecting cell growth and weakening cell attraction.
23 citations
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July 1997 in “British Journal of Dermatology” The inner root sheath is vital for hair follicle stability during growth changes.
March 2016 in “Experimental Dermatology” EGFR helps hair follicles transition properly by controlling Stathmin levels.
April 2023 in “Journal of Investigative Dermatology” The study found that aging hair follicle stem cells change behavior, leading to hair loss, but drugs targeting these cells may help restore hair growth.
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January 1988 Topical DHEA safely increases skin oil production.
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July 1991 in “Veterinary Pathology” A dog had a rare skin condition linked to gland and pituitary issues.
9 citations
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November 2013 in “Gynecological Endocrinology” A woman had high testosterone due to an ovarian issue, which was fixed with surgery.
28 citations
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June 2000 in “PubMed” Androgenetic alopecia is common hair loss due to genetics and DHT.
November 2022 in “Journal of the Endocrine Society” An 8-year-old boy's early puberty was caused by a rare hormone-secreting brain tumor, which was successfully treated with surgery.
December 1981 in “Pediatric Research”
April 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Sweat gland development involves two unique skin cell programs and a temporary skin environment.
February 2021 in “IP Indian journal of clinical and experimental dermatology” A rare non-cancerous tumor that grows like hair was found in an unusual spot, the vulva.
53 citations
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May 1986 in “Clinics in endocrinology and metabolism” Androgens like testosterone affect hair growth and oil production differently across body parts and individuals.
January 2025 in “BMJ Case Reports” Precocious puberty can signal familial adenomatous polyposis.
2 citations
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July 2019 in “Indian dermatology online journal” A 17-year-old girl and her brothers have a rare hair condition with long eyelashes, thick eyebrows, and easily pluckable hair.
6 citations
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April 2013 in “British Journal of Dermatology” Hidradenitis suppurativa is likely caused by blocked hair follicles, not apocrine glands.
122 citations
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November 2010 in “Journal of Dermatological Science” Male pattern baldness involves hormones and cell signals affecting hair growth.
January 2008 in “Journal of The American Academy of Dermatology” ROS may affect hair loss related to hormones.
June 2023 in “Frontiers in Medicine” Protein tyrosine kinases are key in male pattern baldness, affecting skin structure, hair growth, and immune responses.
1 citations
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June 2011 in “대한구강악안면외과학회지” A woman had a cyst in her salivary gland, likely from Botox, which was removed and confirmed as an epidermoid cyst.