Hairless mammals evolved quickly in both gene and non-gene areas related to skin and hair.
19 citations
,
March 1999 in “PubMed” Trichotillomania is a chronic condition where people uncontrollably pull out their hair, often starting in childhood.
May 2022 in “British Journal of Dermatology” The girl's hair condition improved on its own in 24 months.
April 2012 in “Informa Healthcare eBooks” Lichen planopilaris is a rare, chronic condition causing hair loss, mainly in middle-aged women, and early treatment is important to prevent permanent baldness.
8 citations
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December 2020 in “Scientific reports” Selective breeding caused the unique curly hair in Mangalitza pigs.
July 2025 in “Cell & Bioscience” Specific immune cells and pathways contribute to hair follicle inflammation and hair loss, suggesting potential treatments for lichen planopilaris.
January 2026 in “Cosmoderma” A 9-year-old girl has a rare hair disorder causing beaded, sparse hair.
8 citations
,
February 2005 in “Veterinary dermatology” Chesapeake Bay retrievers' hair loss is likely a breed-specific, hereditary condition linked to abnormal steroid levels and distinct skin changes.
10 citations
,
October 1981 in “Archives of Dermatology” The man's skin condition was finally identified as tinea incognito, a fungal infection.
31 citations
,
December 2010 in “Journal of the American Academy of Dermatology” Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.
2 citations
,
January 2017 in “International Journal of Trichology” Trichoscopy can reveal specific hair and scalp changes in linear morphea.
February 2022 in “CRC Press eBooks” Hair disorders include hair loss, excessive hair growth, and ingrown hairs, with various treatments available depending on the cause.
6 citations
,
April 1971 in “Journal of Wildlife Diseases” Switching flying squirrels' diet from seeds to mouse chow restored their hair.
7 citations
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June 1967 in “Journal of Investigative Dermatology” Plucking hairs in a certain way can result in intact hair roots, not related to baldness.
February 2026 in “Journal of the American Academy of Dermatology” 9 citations
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July 2020 in “Journal of cosmetic dermatology” Wigs help patients with hair loss feel more confident and improve their quality of life.
14 citations
,
May 1979 in “International Journal of Dermatology” Trichostasis spinulosa mainly affects the nose, with many tiny hairs in one follicle, possibly influenced by hormones and sunlight.
13 citations
,
March 2000 in “Veterinary Dermatology” Dogs have a skin condition like human pseudopelade, causing hair loss that doesn't improve with treatment.
4 citations
,
July 2010 in “International Journal of Cosmetic Science” Curved human hair has different structures on its convex and concave sides.
3 citations
,
May 2019 in “Australasian Journal of Dermatology” Hair loss in Cronkhite-Canada syndrome may be caused by autoimmune factors, not just stress or malabsorption.
June 2022 in “Indian Dermatology Online Journal” A man with total hair loss developed blackhead-like spots on his scalp, possibly because no hair was present to help drain oils.
17 citations
,
November 1967 in “American Journal of Anatomy” Hairless mice have longer hair follicles and abnormal structures during the catagen phase.
8 citations
,
January 2017 in “Acta Dermato Venereologica” Thorough clinical examination is crucial for diagnosing unusual alopecia.
96 citations
,
February 2002 in “Journal of the American Academy of Dermatology” Pseudofolliculitis barbae is a chronic skin condition affecting mainly African American and Hispanic individuals, caused by shaving tightly curled hair, and managed by prevention and treatment but not curable.
39 citations
,
July 2008 in “Dermatologic Therapy” Pseudopelade of Brocq is a unique hair loss condition, but its cause and development are still not fully understood.
6 citations
,
August 2006 in “Journal of Cutaneous Pathology” Two teenage brothers had a rare, treatment-resistant form of female-pattern hair loss with unusual scalp changes.
June 2024 in “British Journal of Dermatology” Hair oiling has become popular in the West due to globalization and social media.
1 citations
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March 2022 in “Anais brasileiros de dermatologia/Anais Brasileiros de Dermatologia” Trichoscopy helps tell apart hair loss due to alopecia areata from trichotillomania in eyebrows.
April 2018 in “Journal of Investigative Dermatology” Arrector pili muscle regulates hair follicle stem cells, DNA methylation needed for hair cycling, and Wnt/B-catenin signaling starts hair growth.