June 2026 in “JAAD Case Reports” Scurvy, caused by vitamin C deficiency, can occur in people with restrictive diets and can be diagnosed by twisted hair shafts.
16 citations
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June 2005 in “Clinical and Experimental Dermatology” In this study of 30 severe anorexia nervosa patients, true acquired pili torti was not found although twisted hair was observed in 6.6% of cases.
1 citations
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March 2005 in “International Journal of Cosmetic Science” Twisting hair weakens it, but strength can be recovered at low twist levels.
33 citations
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August 2013 in “British Journal of Dermatology” Lack of small, fine hair on the front hairline is a key sign of frontal fibrosing alopecia.
40 citations
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December 2014 in “Indian Journal of Dermatology” This study found that trichoscopy can effectively differentiate scalp psoriasis from seborrheic dermatitis by identifying specific trichoscopic patterns such as hidden hairs, signet ring vessels, and comma vessels.