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.
5 citations,
March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.
August 2023 in “Dermatologic Surgery” Wounding may stimulate hair growth, but more research is needed to confirm the safety and effectiveness of related treatments.
45 citations,
November 1979 in “British Journal of Dermatology” Minoxidil causes excessive hair growth in almost all patients.
1 citations,
May 2007 in “International Journal of Dermatology” Minoxidil, when applied to the scalp, can stimulate hair growth but effects vary, stop if treatment ends, and it may cause side effects like fluid retention.