January 2023 in “Figshare” Mouse skin and hair aging starts at 200 days, with changes in hair follicles and more white hairs as signs of aging.
July 2025 in “Dermatology Practical & Conceptual” A 2-year-old boy has a rare hair disorder causing brittle hair and hair loss, which may improve with age.
53 citations
,
March 2006 in “Biopolymers” TTD hair is brittle due to fewer sulfur amino acids and unstable disulfide bonds.
September 2024 in “Cureus” A 10-year-old boy's nail condition is mainly cosmetic and improves over time with treatment.
10 citations
,
January 2013 in “International Journal of Trichology” Systemic steroids effectively treated severe nail issues in a card illusionist with alopecia areata.
August 2021 in “Acta medica Philippina” A girl's hair loss was found to be caused by both a hair-pulling disorder and another hair loss condition.
May 2026 in “International Journal of Cosmetic Science” UV radiation damages hair similar to bleaching, but double bleaching causes more severe protein degradation.
6 citations
,
January 2016 in “Journal of Biomedical Photonics & Engineering” Clipping hair is gentler on the skin and reduces bacteria better than shaving with a razor.
February 2026 in “Journal of Craniofacial Surgery Open” Hair extensions can damage scalp health and cause hair loss, especially with prolonged use.
13 citations
,
December 2010 in “Archives of Dermatology” Minoxidil use can cause trichostasis spinulosa in long-term hair loss patients.
75 citations
,
October 1996 in “Dermatologic Clinics” Chronic Telogen Effluvium is a hair loss condition in middle-aged women that usually doesn't lead to complete baldness.
April 2025 in “Dermatology Practical & Conceptual” UV-enhanced trichoscopy helps diagnose hair shaft disorders like pili annulati.
25 citations
,
January 2014 in “Annals of Dermatology” Sfrp2 increases during hair follicle catagen phase and slows keratinocyte growth.
1 citations
,
June 1998 in “Journal of Forestry Research” Mammalian hair scales change from smooth to wavy due to friction.
13 citations
,
January 1953 in “Archives of Dermatology” Certain unsaturated compounds can cause temporary hair loss by affecting hair structure.
48 citations
,
August 1998 in “Developmental Biology” Deleting part of a gene in mice causes wavy hair and high pup loss.
December 2024 in “Australian Journal of General Practice” The woman's hair loss pattern doesn't match typical conditions like alopecia areata or female pattern hair loss.
5 citations
,
March 2001 in “Journal of biomechanics” Growing hairs are easier to pull out than resting hairs due to different anchorage strengths.
April 2018 in “Journal of Investigative Dermatology” Mutations in Far2 mice cause hair loss due to sebaceous gland issues.
2 citations
,
August 1999 in “PubMed” Chronic telogen effluvium is a condition that causes ongoing hair shedding.
72 citations
,
July 2003 in “Journal of cosmetic dermatology” Frequent hair coloring and styling can damage hair and cause breakage or loss.
January 2007 in “Durham e-Theses (Durham University)” Hair growth and shedding involve specific cell changes and gene roles.
June 2018 in “Journal of the American Veterinary Medical Association” Three related Persian cats have a rare, likely hereditary skin condition causing hair loss and poor coat quality, with limited treatment options.
44 citations
,
September 2012 in “Archives of Dermatology” Hair breakage may be an early sign of a hair loss condition called CCCA in African American women.
3 citations
,
April 2021 in “Berkala ilmu kedokteran/Journal of the medical sciences” A fungus called Epidermophyton floccosum can cause scalp infections.
107 citations
,
September 2002 in “Journal of Investigative Dermatology” Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.
April 2026 in “International Journal of Molecular Sciences” Wnt signaling is crucial for skin, hair, and nail health and regeneration.
28 citations
,
January 2007 in “Dermatology” Chemotherapy can cause rapid, extensive hair loss, with patterns varying between individuals.
January 2016 in “Indian dermatology online journal” Frontal fibrosing alopecia causes hair loss at the front hairline, and no effective treatment exists.
1 citations
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October 2019 in “International journal of contemporary pediatrics” A 12-year-old boy with twenty nail dystrophy, a condition affecting all nails, was treated conservatively due to its self-limiting nature and good prognosis.