4 citations
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May 2023 in “JAAD case reports” Hyaluronic acid fillers for temporal lifting can cause hair loss without scarring.
4 citations
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March 2021 in “International Journal of Dermatology” COVID-19 and related stress may increase hair loss known as Telogen effluvium.
July 2024 in “The journal of investigative dermatology/Journal of investigative dermatology” Using both topical and oral minoxidil does not reduce hair shedding.
October 2022 in “Hair Transplantation” Temporary scalp trichopigmentation creates a shaved hair look on the scalp using pigments that fade over time.
134 citations
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September 2008 in “Lasers in surgery and medicine” Low fluence photoepilation temporarily removes hair by targeting the hair follicle's pigmented area without severe damage.
Hair loss can happen after severe H1N1 flu but usually grows back in 4 months.
December 2019 in “Journal of pediatrics & neonatology” A 13-year-old boy had a rare, stable type of hair loss with little chance of regrowth, but treatment is available for looks.
41 citations
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July 2015 in “Clinical and Experimental Dermatology” Psoriasis can cause temporary or permanent hair loss.
December 2024 in “Frontiers in Veterinary Science” Dorper sheep's wool shedding is linked to specific genes and pathways, which may help understand human hair growth.
July 2025 in “Clinical and Experimental Dermatology” Hair loss (telogen effluvium) happens before male pattern baldness.
24 citations
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August 2020 in “AJGP” A woman's sudden hair loss was linked to her previous COVID-19 infection.
130 citations
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January 1994 in “Differentiation” Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.
1 citations
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January 2003 in “Annals of Dermatology” Hair in the front part of the scalp is more likely to fall out than hair in the back in acute telogen effluvium.
May 2005 in “Hair transplant forum international” Trichotemnomania causes hair loss due to compulsive hair cutting or shaving.
28 citations
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January 2021 in “Skin appendage disorders” COVID-19 may cause early hair loss similar to classic temporary hair loss, with further research needed.
The chapter explains causes of hair loss and excessive hair growth in animals.
April 2017 in “Journal of Investigative Dermatology” The hair follicle dermal sheath is essential for hair shedding and needs to communicate with the outer root sheath for normal hair growth cycles.
January 2019 in “Journal of Drug Delivery and Therapeutics” Changing six essential health practices can help prevent excessive hair shedding.
14 citations
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March 2000 in “Journal of Zoo and Wildlife Medicine” A new type of mite caused hair loss in a koala, which was treated successfully with ivermectin.
March 2023 in “Italian journal of dermatology and venereology”
April 2016 in “Journal of The American Academy of Dermatology” A vitamin and mineral supplement significantly reduced hair shedding in Brazilian women with telogen effluvium.
May 2025 in “Health Science Reports” Serum WS Biotin significantly reduces hair shedding and improves hair thickness.
January 2024 in “Annals of dermatology/Annals of Dermatology” Weight loss can cause temporary hair loss, especially in women and older adults.
3 citations
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April 2021 in “Revista da Sociedade Portuguesa de Dermatologia e Venereologia” Some people who got COVID-19 experienced temporary hair loss starting around 10 weeks after infection, with many seeing improvement within about 25 days.
10 citations
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October 2000 in “PubMed” E6/E7 oncogenes in hair follicles cause continuous hair growth by skipping the resting phase.
May 2022 in “Journal of Cutaneous Immunology and Allergy” Asymptomatic cats can spread scalp infections to humans.
November 2025 in “Scientific Reports” COVID-19 may cause hair loss by affecting hair follicles.
4 citations
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November 2025 in “Nature Reviews Disease Primers” January 2024 in “Elsevier eBooks”
November 2023 in “Italian journal of dermatology and venereology” Telogen effluvium is a common, often temporary hair loss caused by stress and other factors, and it's hard to pinpoint and treat.