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2. Patch test - Wikipedia

   en.wikipedia.org/wiki/Patch_test

   A patch test relies on the principle of a type IV hypersensitivity reaction.. The first step in becoming allergic is sensitization. When skin is exposed to an allergen, the antigen-presenting cells (APCs) – also known as Langerhans cell or Dermal Dendritic Cell – phagocytize the substance, break it down to smaller components and present them on their surface bound major histocompatibility ...

3. Skin allergy test - Wikipedia

   en.wikipedia.org/wiki/Skin_allergy_test

   A person receiving a skin allergy test. A microscopic amount of an allergen is introduced to a patient's skin by various means: [1] Skin prick test: pricking the skin with a needle or pin containing a small amount of the allergen. [2] Skin scratch test: a deep dermic scratch is performed with help of the blunt bottom of a lancet. [3]

4. Mazzotti reaction - Wikipedia

   en.wikipedia.org/wiki/Mazzotti_Reaction

   The phenomenon is so common when DEC is used for the treatment of onchocerciasis that this drug is the basis of a skin patch test used to confirm that diagnosis. The drug patch is placed on the skin, and if the patient is infected with the microfilaria of O. volvulus, localized pruritus and urticaria are seen at the application site. [citation ...

5. The best skin care routine for your 60s, according to ... - AOL

   www.aol.com/lifestyle/best-skin-care-routine-for...

   The Ordinary Hyaluronic Acid 2% + B5. ... be sure to always perform a patch test and consult with a dermatologist for personalized recommendations, especially if you have sensitive skin or ...

6. Allergy test - Wikipedia

   en.wikipedia.org/wiki/Allergy_test

   Allergy testing can help confirm or rule out allergies and consequently reduce adverse reactions and limit unnecessary avoidance and medications. [1] [2]Correct allergy diagnosis, counseling and avoidance advice based on valid allergy test results is of utmost importance and can help reduce the incidence of symptoms, and the need for medications and improve quality of life. [2]

7. Nickel allergy - Wikipedia

   en.wikipedia.org/wiki/Nickel_allergy

   Nickel allergy is typically diagnosed by patch testing – applying a patch with 2.5% (in North America) or 5% (in Europe) nickel sulfate to the upper back and looking for irritation on the skin. [2] As with other causes of allergic contact dermatitis, patches containing several common allergens are typically applied to the back for 48 hours ...