June 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Six new risk spots for early hair loss were found, which also link to Parkinson's disease and lower fertility. Two genes, FOXA2 and HDAC4, could be new treatment targets. Hair loss might also be connected to heart disease, metabolic syndrome, and prostate cancer.
January 2022 in “Journal of Drug Delivery and Therapeutics” COVID-19 can cause temporary hair loss, known as Telogen Effluvium, within two months of infection.
November 2024 in “Cureus” Early diagnosis and personalized treatment can prevent damage from dissecting cellulitis after hair restoration surgery.
July 2021 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
December 2021 in “Turkderm” The COVID-19 pandemic led to fewer dermatology patients, more stress-related skin conditions during the crisis, and a rise in contact dermatitis after, with ongoing concerns for public health and treatment delays.
January 2009 in “대한피부과학회지” The document's conclusion cannot be provided because the text is not in English and cannot be parsed.
5 citations,
December 2018 in “Journal of Cosmetic Dermatology” PRP treatment improves hair count, density, and reduces hair loss in AGA patients.
12 citations,
January 1984 in “Anesthesia & Analgesia” Anesthesia and surgery can cause temporary hair loss, but hair usually grows back without treatment.
A man had temporary hair loss after a spinal cord injury, with some permanent thinning remaining.
13 citations,
August 2018 in “Journal of Molecular and Cellular Cardiology” Finasteride improves heart function and repairs damage after heart attack in mice.
May 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Prostaglandin D2, found in higher levels in bald scalps, stops hair growth, suggesting that blocking its receptor could potentially treat hair loss.
July 2019 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Activin A speeds up ear hair cell differentiation, while Follistatin slows it down.
5 citations,
October 2018 in “American Journal of Clinical Dermatology” Skin problems are common after stem cell transplants, and early treatment by dermatologists can improve patient outcomes.
September 2023 in “Dermatology and therapy” Ritlecitinib effectively improves hair growth in alopecia areata patients, regardless of hair loss pattern.
June 2023 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Bicalutamide mesotherapy improved hair density in women with hair loss and was well received.
October 2013 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” FGF9 from certain T cells helps create new hair follicles during wound healing, which could potentially be used for hair loss treatments.
April 2022 in “The Journal of Urology” Men may experience long-term sexual dysfunction after stopping Finasteride.
September 2014 in “Archives of disease in childhood” A 12-year-old boy had severe shingles and skin damage after a stem-cell transplant.
10 citations,
April 2018 in “Maturitas” Excess male hormones in postmenopausal women can cause health issues and increase the risk of heart disease and diabetes; treatment depends on the cause.
1 citations,
January 2019 in “PubMed” A woman developed a hair disorder after a bone marrow transplant, which improved with treatment.
March 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Hair loss can be an early sign of prostate enlargement.
February 2016 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” A hair test can accurately predict if a person with hair loss will respond to minoxidil treatment.
June 2020 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” 
June 2017 in “JPRAS Open” Hair transplant was successful on a bald area after skin graft surgery.
July 2023 in “Skin health and disease” Most UK survey participants had negative side effects from botulinum toxin injections, with many not fully recovering physically, emotionally, or financially.
3 citations,
August 2022 in “Curēus” The SARS-CoV-2 vaccine may be linked to triggering autoimmune conditions like Alopecia Areata.
November 2022 in “Journal of the Endocrine Society” A transman experienced lasting virilization symptoms after stopping testosterone, which were resolved with estradiol treatment.
2 citations,
January 2023 in “Journal of Dermatology” Some types of hair loss can continue for a long time after recovering from a severe drug reaction known as DRESS.
September 2019 in “Journal of The American Academy of Dermatology” Using a microfoam plaster on the forehead helps prevent eyelid swelling after hair transplant surgery.
March 2012 in “Journal of the American Academy of Dermatology” African Americans lack knowledge about laser hair removal safety, Nd:Yag laser treatment is effective with high satisfaction, pressure during surgery can cause hair loss, and treating ovarian inflammation may help with alopecia areata.