March 2025 in “International Journal of Trichology” Vigorous rubbing of herbal powder on the scalp caused hair damage and loss.
1 citations
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January 2017 in “Yonsei Medical Journal” Hair is thinner near the scalp in acute hair shedding conditions.
4 citations
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December 2020 in “Journal of the American Academy of Dermatology” Pulling 2 or fewer hairs is normal for all hair types, including Afro- and Asian-textured hair.
January 1962 in “Archives of Dermatology” A 5-year-old girl has lipoid proteinosis, causing voice issues, hair thinning, skin lesions, and tongue movement problems.
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
April 2012 in “Informa Healthcare eBooks” The document concludes that diagnosing hair loss requires evaluating multiple histological features, as no single feature is definitive on its own.
48 citations
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January 2002 in “Journal of Structural Biology” Trichocyte filaments have a low-density core and may include proteins for hair structure.
January 2017 in “Journal of Cosmetics, Dermatological Sciences and Applications” Chinese women's hair gets thinner and grayer with age, and scalp conditions change, especially after 40.
3 citations
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May 2017 in “BMJ Case Reports” A 15-year-old boy's skin and hair condition worsened due to improper treatment, leading to severe health issues.
May 2009 in “International Journal of Cosmetic Science” Permanent waving damages hair protein and weakens hair, especially with repeated treatments using sodium thioglycolate.