March 2026 in “Frontiers in Medicine” Diffuse unpatterned alopecia can affect donor areas, but treatment with finasteride and minoxidil can improve hair density.
September 2023 in “Clinical, Cosmetic and Investigational Dermatology” About one-third of Saudi women with female pattern hair loss also have thinning hair at the back of their head.
7 citations
,
October 2018 in “Journal of Craniofacial Surgery” About 21.3% of young, healthy Chinese men experience hair loss. Hairlines are mostly linear or have a central protrusion. Hair is densest on the top and back of the head, and hair follicles usually have 1 or 2 hairs. This information can help in designing hair restoration procedures.
14 citations
,
May 2014 in “Archives of plastic surgery” The position of the parietal whorl can predict safe donor areas for hair transplants in Korean men with male pattern baldness.
2 citations
,
January 2019 in “PubMed” The study concluded that certain areas of the scalp and beard are safe for hair transplant donor sites in Indian men.
June 2014 in “Toxicologie analytique et clinique/Annales de toxicologie analytique” Hair analysis can be unreliable due to external contamination and varying drug concentrations.
2 citations
,
September 2017 in “Plastic and Aesthetic Research” Healthy Han Chinese have lower hair density than whites and Africans, and transplanting 300 hair units can nearly restore normal hair density.
December 2022 in “JEADV Clinical Practice” Hair density and thickness decrease in specific scalp areas in people with androgenetic alopecia.
3 citations
,
November 2021 in “Frontiers in Medicine” Advanced male pattern baldness affects the back of the scalp, reducing hair follicles.
July 2025 in “Journal of the American Academy of Dermatology” Hair diameter diversity helps assess hair loss, but its standard measure varies by individual and ethnicity.
June 2024 in “Skin Research and Technology” Botulinum toxin treatment improves hair follicle width and length in androgenetic alopecia.
2 citations
,
October 2020 in “International Journal of Dermatology” Lichen planopilaris in men often involves scalp redness and itching, with some also having hair loss, mucosal lichen planus, or thyroid disease, and treatment improved symptoms in nearly half of the cases.
February 2026 in “Frontiers in Medicine” Oral minoxidil improved hair loss more than oral dutasteride.
January 2024 in “Journal of Cosmetics Dermatological Sciences and Applications” Females with pattern hair loss have more occipital involvement than males.
15 citations
,
January 2011 in “Annals of Dermatology” The study concluded that neonatal occipital alopecia is common, not caused by physical friction, and usually resolves on its own without treatment.
3 citations
,
January 2019 in “Dermatology and therapy” Scalp massages may help stabilize or regrow hair in people suffering from hair loss, regardless of age, gender, or use of other treatments.
16 citations
,
January 2007 in “Actas dermo-sifiliográficas/Actas dermo-sifiliográficas” The document concludes that there are no reliable treatments for frontal fibrosing alopecia, with only temporary benefits from current options.
10 citations
,
July 2017 in “Archives of Plastic Surgery” Hair thickness decreases from the upper to lower areas of the back of the head, affecting hair transplant results.
51 citations
,
January 2004 in “Skin Pharmacology and Physiology” The document explains hair growth and shedding, factors affecting it, and methods to evaluate hair loss, emphasizing the importance of skin biopsy for diagnosis.
February 2026 in “Cureus” Two methods reliably measure scalp area and hair count.
July 2025 in “International Journal of Dermatology Venereology and Leprosy Sciences” Examining Survivin levels may help understand premature greying of hair.
The study aims to create a model to improve personalized and preventive health care.
84 citations
,
February 2013 in “Clinica chimica acta” Hair mineral analysis might help diagnose diseases early, but standard methods are needed.
June 2022 in “Journal of The European Academy of Dermatology and Venereology” Microneedling with topical dutasteride improves hair growth in men with hair loss and is safe to use.
31 citations
,
February 2020 in “BioMed Research International” Thai people's hair density decreases with age and varies by scalp area, but hair thickness stays the same regardless of age or scalp area.
51 citations
,
March 1987 in “Journal of The American Academy of Dermatology” Minoxidil keeps most hair growth from first year and twice-daily use is better with few side effects.
30 citations
,
March 2006 in “Dermatologic Surgery” Finasteride improves surrounding scalp hair and increases hair density after hair transplant.
23 citations
,
October 2005 in “Dermatologic Surgery” Finasteride improves surrounding scalp hair and increases hair density after hair transplant.
4 citations
,
December 1992 in “The American Journal of Cosmetic Surgery” The modified S pattern for scalp reduction is effective for removing more bald scalp and hiding scars in hair restoration.
November 2002 in “Dermatologic Surgery” Scalp reduction gives the most natural result for significant crown baldness, despite potential complications, and a systematic approach to surgical hair restoration results in few complications and high graft survival.