This review highlights that hair care products can cause adverse effects like irritation dermatitis and allergic contact eczema but does not report new clinical findings.
20 citations
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June 2011 in “ISRN Dermatology (Print)” This case report describes a woman experiencing severe hair loss due to allergic contact dermatitis from a hair dye containing PPD.
5 citations
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October 1984 in “The BMJ” Up to 50% of scalp hair can be lost before it appears thin, and treatment is only needed for hair loss caused by diseases or deficiencies.
June 1992 in “Inpharma Weekly” Patch testing with different solvents helps find the right minoxidil formulation for those with scalp allergies.
152 citations
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April 2012 in “Recent Patents on Inflammation & Allergy Drug Discovery” This review describes minoxidil's hair regrowth mechanism and discusses dermatological applications, but reports no new clinical results, emphasizing the need for regular use and addressing allergic reactions.
4 citations
,
March 2007 in “Annales de Dermatologie et de Vénéréologie” This review discusses the adverse effects of hair care products, highlighting irritation dermatitis and allergic contact eczema due to common allergens like paraphenylenediamine and glycerol monothioglycolate, but reports no clinical results.
July 2023 in “Skin Research and Technology” This study reports that combining baricitinib with low-dose cyclosporine and steroids resulted in effective and safe treatment for a case of alopecia totalis, maintaining hair regrowth without adverse effects.
November 2015 in “Pediatrics in review” This case report describes a 15-year-old boy who experienced severe allergic contact dermatitis from hair dye, highlighting the importance of identifying allergens through patch testing.
11 citations
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June 2018 in “Annales de dermatologie et de vénéréologie” This narrative review discusses adverse reactions associated with hair care products, specifically irritation dermatitis and allergic contact eczema, and suggests the need for attention to common allergens like PPD, GMTG, and ammonium persulphate.
January 2013 in “Hair transplant forum international” This review discusses current medical therapies available for treating hair loss and emphasizes the importance of understanding these options, but it presents no new results.
May 2017 in “Journal of The American Academy of Dermatology” This study reported an increase in allergic contact dermatitis cases linked to natural products, particularly propolis and marigold, with a higher incidence in women than men.
May 2017 in “Journal of The American Academy of Dermatology” This study found an increase in allergic contact dermatitis cases linked to natural products like propolis and marigold, predominantly affecting women in a Bulgarian population.
123 citations
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February 2002 in “Journal of The American Academy of Dermatology” Minoxidil can cause skin allergy; use alternative solvents or treatments if allergic.
This review discusses the potential link between contact allergy and frontal fibrosing alopecia, noting the presence of implicated allergens in current literature, but reports no new clinical findings.
January 2010 in “Actas Dermo-Sifiliográficas” A woman was allergic to quinine in her anti-hair loss lotion.
June 2026 in “Frontiers in Allergy” In this study, patients with scalp seborrheic dermatitis exhibited distinct patterns of allergen sensitization tied to symptoms, impaired skin barrier, and altered microbiota, emphasizing the need to consider allergen exposure, barrier status, and microbial balance when interpreting patch test results.
2 citations
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January 1998 in “Dermatology” Stopping forehead irritation and using hydrocortisone helped a man's skin, Martinique has lower melanoma rates, a man had an allergy to a specific antifungal, another had unexplained cysts, certain drugs can cause skin reactions without always being interrelated, a link between Fanconi anemia and a skin condition was suggested, high levels of a certain protein may play a role in a type of psoriasis, and there's a need to study the connection between scalp pain and hair loss.
2 citations
,
August 1987 in “Australasian Journal of Dermatology” This review discusses skin diseases related to contraceptive use, reporting potential issues with oral contraceptives and infrequent reactions to mechanical or barrier methods without new clinical findings.
This study found that patients with scalp seborrheic dermatitis exhibited distinct allergy sensitization patterns linked to skin barrier dysfunction and changes in scalp microbiota, suggesting the importance of context in interpreting patch test reactivity.
4 citations
,
January 1989 This case study reported that two patients treated for androgenetic alopecia with Regaine® solution developed allergic contact dermatitis due to propylene glycol, highlighting the importance of testing the vehicle in patch tests.
January 2004 in “Journal of Clinical Dermatology” This study reported a case of a 34-year-old male developing allergic contact dermatitis to minoxidil solution, with positive patch test reactions attributed to the solution's ingredients, highlighting the potential for propylene glycol sensitivity.
23 citations
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April 1991 in “Journal of The American Academy of Dermatology” Minoxidil solution can cause skin irritation and allergies in some users.
7 citations
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January 2021 in “Cureus” This case report describes a 27-year-old woman who experienced facial swelling due to allergic contact dermatitis from using minoxidil 5% foam.
February 2026 in “Indian Journal of Dermatology” This study from a dermatology department found that patch test positivity for allergic contact dermatitis is lower in geriatric patients than in adults, likely due to age-related immune changes and reduced allergen exposure.
September 2017 in “Pediatric Dermatology” No results are reported in this correspondence published in Pediatric Dermatology, as it responds to prior communication about contact dermatitis related to alopecia and hyperpigmentation.
October 2025 in “Dermatology and Therapy” This study reviewed the literature on atopic dermatitis and found a strong connection with several other skin conditions, such as psoriasis and alopecia areata, while highlighting potential treatments like JAK inhibitors and dupilumab that show promise for these comorbidities.
20 citations
,
October 2013 in “British Journal of Dermatology” The document concludes that clinicians should be aware of common hair and scalp disorders in women of African descent and that more research is needed to develop effective treatments.
28 citations
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November 2017 in “Skin appendage disorders” This paper proposes a systematic approach to evaluating scalp itch using the SCALLP acronym and highlights the importance of classifying cases based on the presence of dermatological lesions and hair loss, but it reports no new clinical findings.
8 citations
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April 2020 in “Journal of The American Academy of Dermatology” This report describes nine women who were allergic to topical minoxidil but successfully tolerated low-dose oral minoxidil without significant adverse effects, suggesting it may be a viable alternative for those with similar allergies.
15 citations
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July 2002 in “Australasian Journal of Dermatology” In this case report, two plywood mill workers developed allergic contact dermatitis due to exposure to uncured phenol-formaldehyde resin, not sawdust as initially suspected.