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    Did you mean Allergic Reactions?
    Glossary Allergic Reactions

    immune system overreacts to harmless substances, causing symptoms

    An allergic reaction, also known as a hypersensitivity reaction, occurs when the immune system mistakenly identifies a harmless substance (allergen) as a threat and overreacts to it. This can lead to symptoms ranging from mild, such as itching and sneezing, to severe, such as anaphylaxis, which can be life-threatening. Common allergens include pollen, pet dander, certain foods, and insect stings.

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    1. New Aspects of Langerhans' Cell Function International Journal of Dermatology · 1980 · 57 citations
    2. Psoriatic Alopecia/Alopecia Areata–Like Reactions Secondary to Anti–Tumor Necrosis Factor-α Therapy: A Novel Cause of Noncicatricial Alopecia The American Journal of Dermatopathology · 2011 · 72 citations
    3. 83 Transcriptomic meta-analysis and deconvolution approaches unveil cellular dynamics in scarring and non-scarring primary lymphocytic alopecias Journal of Investigative Dermatology · 2023
    4. Lymphocytic Mural Folliculitis Resembling Epitheliotropic Lymphoma in Tigers (<i>Panthera tigris</i>) Veterinary Pathology · 2018
    5. Exosome-Based Therapies in Dermatology: A Scoping Review Journal of Drugs in Dermatology · 2026
    6. Effects of Visible Light on the Skin<sup>†</sup> Photochemistry and Photobiology · 2008 · 195 citations
    7. Current applications of high-frequency ultrasonography in dermatology Postępy Dermatologii i Alergologii · 2017 · 65 citations
    8. Mucocutaneous side effects of antineoplastic chemotherapy Expert opinion on drug safety · 2004 · 55 citations
    9. Morphological characteristics and notes of the skin in preclinical toxicity assessment Journal of toxicologic pathology · 2022 · 2 citations
    10. Exploring the Efficacy and Potential Mechanisms of Topical Periplaneta americana (L.) Extract in Treating Androgenetic Alopecia in a Mouse Model: A Systems Pharmacology and Skin Microbiome Analysis Biology · 2025
    11. Dorsal skin responses to subchronic ultraviolet B (UVB)-irradiation in Wistar-derived hypotrichotic WBN/ILA-Ht rats. PubMed · 2002 · 7 citations
    12. P-Phenylenediamine-Induced Angioedema-like Facies: A Case Report and Review of Pathomechanisms Indian Dermatology Online Journal · 2026
    13. Regulation of immune response genes in the skin of allergic and clinically tolerant individuals exposed to p‐phenylenediamine Allergy · 2024 · 4 citations
    14. Hypersensitivity Reactions to Anticoagulant Drugs Current Pharmaceutical Design · 2008 · 28 citations
    15. Cutaneous drug reactions Elsevier eBooks · 2010 · 1 citations
    16. Gamma/delta T cells and human skin reactivity to heavy metals Archives of Dermatological Research · 1995 · 13 citations
    17. Toluene Diisocyanate (TDI) Disposition and Co-Localization of Immune Cells in Hair Follicles Toxicological Sciences · 2014 · 21 citations
    18. A review of environmental and health effects of synthetic cosmetics Frontiers in Environmental Science · 2024 · 16 citations
    19. Mesotherapy Series in cosmetic and laser therapy · 2010 · 1 citations
    20. Contact dermatitis to phenol‐formaldehyde resin in two plywood factory workers Australasian Journal of Dermatology · 2002 · 15 citations
    21. Pollen Allergies in Humans and their Dogs, Cats and Horses: Differences and Similarities Clinical and Translational Allergy · 2015 · 36 citations
    22. Severe pustular lesions induced by topical immunotherapy with squaric acid dibutylester for alopecia totalis Journal of Cutaneous Immunology and Allergy · 2019 · 1 citations
    23. Role of PRP (platelet-rich plasma) in alopecia areata: A literature review Bali Medical Journal · 2020
    24. Cyclosporin A: a new drug in the field of canine dermatology Veterinary Dermatology · 2004 · 84 citations
    25. EFFECTIVENESS OF PLASMOTHERAPY IN VARIOUS NOSOLOGIES Vrach · 2023 · 2 citations
    26. Reviewing and Exploring the Prospects of Platelet-Rich Plasma (PRP) Therapy in the Context of Pediatric Surgical Wound Management International journal of medical science and clinical research studies · 2023
    27. Abstracts Journal of The American Academy of Dermatology · 1988
    28. Palmitoylethanolamide-Incorporated Elastic Nano-Liposomes for Enhanced Transdermal Delivery and Anti-Inflammation Pharmaceutics · 2024 · 8 citations
    29. Systematic Evaluation of Rosemary Essential Oil in Aromatherapy Practice: A Review Natural Product Communications · 2025
    30. Acute localized exanthematous pustulosis due to metronidazole Journal of The European Academy of Dermatology and Venereology · 2019 · 7 citations