January 2012 in “Case reports in pediatrics” A 16-year-old boy's arm hair grew more after wearing a splint, but it returned to normal in 8 months.
26 citations
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April 2007 in “Journal of clinical oncology” 5 citations
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March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.
March 2025 in “International Journal of Trichology” Vigorous rubbing of herbal powder on the scalp caused hair damage and loss.
5 citations
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December 2018 in “Annals of plastic surgery” Some burn patients grew extra hair in areas treated with pressure garments or silicone.