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GlossaryAxillary Hair

hair growing in the underarm area, starting during puberty

Axillary hair, commonly known as armpit hair, refers to the hair that grows in the underarm area. It typically begins to develop during puberty due to hormonal changes, specifically the increase in androgens. This hair serves various functions, including reducing friction between the upper arm and the torso, and playing a role in the dispersion of pheromones.

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research A Unique Acquired Athletic Dermatologic Condition in a Half Marathon Participant: An Autobiographical Case Report of Sports-Associated Clothing Related Axillary Tangled Clumped Hairs (SCRATCH)

May 2025 in “Cureus”

A runner developed tangled armpit hairs from shirt friction, preventable by shaving or wearing smooth shirts.

research Dermoscopy Findings of the Axilla of Women With Frontal Fibrosing Alopecia

December 2023 in “JEADV Clinical Practice”

Brownish halos around axillary hair can help diagnose frontal fibrosing alopecia.

research Androgen Regulation of the Human Hair Follicle: The Type I Hair Keratin hHa7 Is a Direct Target Gene in Trichocytes

49 citations , March 2004 in “Journal of Investigative Dermatology”

The hHa7 gene is regulated by androgens in certain body hair, not scalp hair.

research Trichomycosis Axillaris: A Case Report

January 2018 in “Our Dermatology Online”

Trichomycosis axillaris is a treatable bacterial infection of underarm hair.

research Inherited Hairlessness: A Case Study of Familial Congenital Atrichia

April 2023 in “Curēus”

The document concludes that the girl's hairlessness is likely inherited from her parents.

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community A Different Take on Curing MBP

17 upvotes 7 years ago

Addressing hair loss by focusing on posture, blood flow, and craniofacial development. Methods include improving posture, cardiovascular activity, scalp massages, healthy diet, meditation, using minoxidil, and addressing craniofacial issues.