February 2020 in “VSNU Open Access deal” Hair cortisol levels change with age, starting high at birth, decreasing until age 6, then rising to adult levels by age 18.
June 1995 in “International Journal of Gynecology & Obstetrics” Long-term use of oral contraceptives, especially starting before age 20, may increase the risk of early-onset breast cancer.
140 citations
,
December 1998 in “Journal of Investigative Dermatology” Apoptosis in hair follicles varies by growth phase, with TGF-β possibly starting the catagen phase.
70 citations
,
November 2013 in “The BMJ” Tamsulosin for enlarged prostate may increase the risk of severe low blood pressure, especially when starting or restarting the medication.
41 citations
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November 2013 in “Experimental Dermatology” Leptin, a hormone, is important for starting hair growth.
30 citations
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April 2009 in “Mycoses” Microsporum gypseum fungus breaks down keratin in hair by digesting it enzymatically, starting with less keratinized parts.
30 citations
,
July 2004 in “Fertility and Sterility” Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.
22 citations
,
April 1967 in “Australian Journal of Zoology” Southern elephant seals develop hair follicles and skin layers before birth, with moulting starting a week after birth and finishing in three weeks.
21 citations
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February 2012 in “Journal of the European Academy of Dermatology and Venereology” Late-onset alopecia areata in Taiwanese patients is more common in women, usually starts at age 57, often involves less than 10% hair loss, and may have a minimal link to thyroid issues.
21 citations
,
September 2010 in “Archives of Dermatology” A woman developed psoriasis after taking certolizumab pegol, improving after stopping the drug and starting other treatments.
20 citations
,
October 1995 in “Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression” hHb1, hHb3, and hHb6 mRNAs start expressing at the same time in hair follicles.
19 citations
,
December 2021 in “Endocrine Reviews” There are various effective hormone treatments for puberty induction in boys and girls with hypogonadism, and starting treatment early is important.
19 citations
,
March 1999 in “PubMed” Trichotillomania is a chronic condition where people uncontrollably pull out their hair, often starting in childhood.
16 citations
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April 2011 in “Recent Patents on Inflammation & Allergy Drug Discovery” Alopecia Areata is an autoimmune disease causing hair loss in patches, often starting before age 20, and while some cases recover on their own, treatments include topical corticosteroids, minoxidil, and promising new methods like IL-31 antibodies and 308-nm Excimer laser therapy.
16 citations
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January 2007 in “JEADV. Journal of the European Academy of Dermatology and Venereology/Journal of the European Academy of Dermatology and Venereology” A man had an allergic reaction to minoxidil, which stopped after he discontinued use and started corticosteroids.
14 citations
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August 2013 in “Facial Plastic Surgery Clinics of North America” Some nonsurgical hair loss treatments are effective, especially if started early.
14 citations
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August 2010 in “The Open Dermatology Journal” Australian women with female pattern hair loss have a poorer quality of life, and starting treatment doesn't immediately improve it.
12 citations
,
January 2016 in “Skin appendage disorders” Hair restoration surgery can potentially treat primary scarring alopecias, but it's important to start early medication, ensure patient remission before transplant, and monitor after surgery.
10 citations
,
January 2016 in “Dermatology online journal” Adults with persistent scalp issues unresponsive to typical treatments should be tested for the fungal infection tinea capitis to start the right antifungal medication.
10 citations
,
June 2014 in “Experimental Dermatology” Decorin, a protein, may help start hair growth and could be used to treat hair loss.
7 citations
,
March 2019 in “Journal of The European Academy of Dermatology and Venereology” A man developed a skin reaction from metronidazole, which improved after stopping the drug and starting steroids.
7 citations
,
January 2017 in “Neuromuscular Disorders” A rare autoimmune condition, Satoyoshi syndrome, can start in adults and improve with immunosuppressive treatment.
6 citations
,
July 2017 in “Case Reports” Hair loss, known as androgenic alopecia, can start in teenage years and may not always be hormone-related. It's important to do extra tests in young cases and remember it can greatly affect a teenager's mental health.
5 citations
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December 2019 in “JAAD Case Reports” A woman experienced rapid hair loss after taking albendazole, but it started to improve when she stopped the medication.
4 citations
,
August 2007 in “PubMed” A woman lost all her body hair after hepatitis C treatment, but it started to grow back a year after stopping the treatment.
3 citations
,
January 2019 in “Journal of Dermatology” The p.P25L mutation in the KRT5 gene causes a rare skin condition that worsens over time and may lead to hair loss starting in young adulthood.
2 citations
,
May 2022 in “JAAD Case Reports” A woman lost all her hair after mild COVID-19, but it started to regrow after treatment with a specific medication.
1 citations
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December 2025 in “Photodermatology Photoimmunology & Photomedicine” Phototherapy effectively treats certain alopecia areata types, especially if started early.
1 citations
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February 2020 in “International Journal of Research in Dermatology” Scalp alopecia areata mostly affects young adult males, often starts suddenly, and usually presents as single, patchy lesions.
1 citations
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January 2004 in “Adelaide Research & Scholarship (AR&S) (University of Adelaide)” SPARC likely aids in tissue remodeling during the hair cycle, not in starting new hair growth phases.