January 2020 in “Archives of urology” Finasteride, a drug used for certain conditions, can cause serious side effects like sexual dysfunction, suicidal thoughts, and increased diabetes risk, and there's a need for more awareness and research about these effects.
Ovol2 is crucial for hair growth and skin healing by controlling cell movement and growth.
January 2009 in “Chinese journal of Clinical Medicine”
7 citations
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August 2006 in “Biopolymers” Researchers extracted tiny keratin filaments from human hair by unzipping its outer layer.
3 citations
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September 2016 in “Hair transplant forum international” To avoid damaging hair follicles during strip harvesting, use a specific technique.
October 2024 in “Cosmetics” ATG effectively reduces hair frizz without damaging hair strength.
2 citations
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September 2008 in “International Journal of Cosmetic Science” Brushing causes more long hair breaks than combing, especially with bleached or wet hair.
9 citations
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March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
September 2025 in “International Journal of Cosmetic Science” Friction causes hair breakage during combing, and fragment count predicts hair strength.
3 citations
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October 1990 in “Journal of the American Academy of Dermatology” Mechanical trauma like towel drying can cause knotted hair even in straight hair.
July 2018 in “Elsevier eBooks” Stopping tight hairstyles can prevent and reduce traction alopecia.
December 2025 in “British Journal of Dermatology” 1 citations
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October 1978 in “The Journal of Pediatrics”
February 2019 in “PubMed” The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.
January 2021 in “Nasza Dermatologia Online” Plica polonica is a rare condition where hair becomes irreversibly tangled, and the treatment is to cut the matted hair.
March 2026 in “Journal of Investigative Dermatology” 7 citations
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June 2018 in “Journal of the American Academy of Dermatology” The document suggests finding a simpler, cheaper way to diagnose Uncombable Hair Syndrome.
February 2013 in “Journal of the American Academy of Dermatology” Uncombable hair syndrome causes dry, frizzy hair that can't be combed flat, seen in a young child.
Perming, combing, and stretching damage hair by reducing keratin levels.
January 2023 in “Skin appendage disorders” Two Hispanic women developed Plica neuropathica, a condition causing tangled hair, possibly due to hair damage and various risk factors.
18 citations
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January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
November 2001 in “PubMed” Perming, combing, and stretching damage hair by reducing keratin.
19 citations
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October 1985 in “British Journal of Dermatology” The document concludes that unruly hair can be congenital or acquired, often lacks specific treatments, and can be managed with oils and short hairstyles.
2 citations
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January 2015 in “Sen'i Gakkaishi” Washing permed hair after using thioglycolic acid helps reform strong bonds, making hair stronger.
3 citations
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April 1978 in “PubMed” The study concludes that traction alopecia, caused by hair styling, can help understand telogen effluvium, a condition of excessive hair loss.
5 citations
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March 2001 in “Journal of biomechanics” Growing hairs are easier to pull out than resting hairs due to different anchorage strengths.
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
March 2026 in “Indian Journal of Dermatopathology and Diagnostic Dermatology” Corkscrew hairs can help diagnose trichotillomania.
60 citations
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April 2018 in “Clinical, cosmetic and investigational dermatology” Tight hairstyles and chemical relaxers can cause hair loss known as traction alopecia.
19 citations
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July 2004 in “Australasian Journal of Dermatology” Her hair grew back normally after she stopped rubbing it.