Search
for

    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.

    Related Terms

    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 testing procedures in patients suffering from suspected allergic contact dermatitis to minoxidil 1989 · 4 citations
    7. 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
    8. Delayed hypersensitivity reaction to intralesional triamcinolone acetonide following treatment for alopecia areata. Intradermal testing. Journal of Dermatological Case Reports · 2015 · 6 citations
    9. 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
    10. Contact allergy to essential oils cannot always be predicted from allergy to fragrance markers in the baseline series Contact Dermatitis · 2016 · 23 citations
    All research results →

    Learn 3 of 12

    1. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    2. Tofacitinib JAK inhibitor pill, an immune-system drug
    3. Neem Oil Oil from the neem tree, used in traditional remedies
    All learn results →

    Community 4 of 21

    1. Patch Behind Ear Possibly Due to Glasses, Is it Traction Alopecia? Community · 17 Dec 2025
    2. Patchy side , 5 months and a half Reddit · 17 Sept 2024
    3. Sudden Triangular Thinning Patch Community · 22 Aug 2025
    4. Is keratin fusion bond good alternative to clip on hair patch for diffused thinners Reddit · 6 Sept 2023
    All community results →