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    Did you mean Patch Testing?
    Glossary Patch Testing

    diagnostic method to identify skin allergies to specific substances

    Patch testing is a diagnostic procedure used to identify substances that cause allergic contact dermatitis. Small amounts of potential allergens are applied to patches, which are then placed on the skin, usually on the back, for 48 hours. The skin is examined for reactions at 48 hours and again at 72-96 hours to determine if an allergy is present.

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    Research 10 of 1000+

    1. Patch testing with hair cosmetic series in Europe: a critical review and recommendation Contact Dermatitis · 2015 · 47 citations
    2. Patch testing and contact allergen avoidance in patients with lichen planopilaris and/or frontal fibrosing alopecia: A cohort study Journal of the American Academy of Dermatology · 2020 · 35 citations
    3. Photopatch and patch testing in 63 patients with frontal fibrosing alopecia: a case series British Journal of Dermatology · 2018 · 24 citations
    4. Common Allergens Identified Based on Patch Test Results in Patients with Suspected Contact Dermatitis of the Scalp Skin appendage disorders · 2016 · 16 citations
    5. Patch Testing in Allergic Contact Dermatitis from Minoxidil Dermatitis · 2010 · 11 citations
    6. Patch tests with commercial hair dye products in patients with allergic contact dermatitis to para-phenylenediamine Indian Journal of Dermatology Venereology and Leprology · 2016 · 6 citations
    7. Patch testing procedures in patients suffering from suspected allergic contact dermatitis to minoxidil 1989 · 4 citations
    8. Influence of Atopic Dermatitis on the Dermoscopic Phenotype of Positive Patch Test Reactions: A Prospective Comparative Study Life · 2026
    9. Patch test positive results in patients with biopsy‐proven central centrifugal cicatricial alopecia Journal of the European Academy of Dermatology and Venereology · 2024
    10. Analysis of Patch Testing for Allergic Contact Dermatitis in Adults Versus Geriatrics: A 7-Year Retrospective Analysis of 342 Positive Patch Test Cases Indian Journal of Dermatology · 2026
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    Community 6 of 21

    1. Is anybody here combining oral dutasteride with topical dutasteride? Reddit · 25 Jul 2024
    2. Onion Juice - An effective topical treatment for Alopecia Areata 🧬 Reddit · 25 Mar 2023
    3. Patch Behind Ear Possibly Due to Glasses, Is it Traction Alopecia? Community · 17 Dec 2025
    4. Patchy side , 5 months and a half Reddit · 17 Sept 2024
    5. Sudden Triangular Thinning Patch Community · 22 Aug 2025
    6. Is keratin fusion bond good alternative to clip on hair patch for diffused thinners Reddit · 6 Sept 2023
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    Learn 10 of 12

    1. Alopecia Areata autoimmune disorder causing patchy hair loss
    2. KY19382 Experimental compound that activates hair-growth signals, tested only in animals
    3. Hydrocortisone Mild corticosteroid used on the skin and scalp
    4. HMI-115 Experimental antibody that blocks the prolactin receptor
    5. Baricitinib JAK inhibitor pill used for severe alopecia areata
    6. Castor oil Thick plant oil used in hair care
    7. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    8. Mesotherapy Injections of drug or vitamin mixtures into the scalp
    9. Tofacitinib JAK inhibitor pill, an immune-system drug
    10. Neem Oil Oil from the neem tree, used in traditional remedies
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