Patch Testing
Patch testing is a technique used to determine whether a particular substance causes
allergic reaction
in patients. A patch test may be considered for a patient with
dermatitis
potentially caused by a substance at the person’s home or office such as preservatives or fragrances in shampoo or sunscreens, hair dye or chemicals such as nickel. A
dermatologist
undertakes patch testing. Patch testing is used for contact allergies and differs from skin prick testing as it does not test for
hay fever allergies
,
food allergies
or
hives
. Patches are applied with the allergens tailored for the patient across their back. Patches are left on for around five days. Positive allergic reactions will present as a rash of varying irritability. If there are strong positive reactions an ‘angry back’ response can occur where dermatitis flares up creating a false positive result. Further testing may be required to diagnose the particular allergen.
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Southern Cross Health Society Affiliated Provider for Consultations
Auckland Dermatology is the largest dermatology practice in New Zealand. We prides ourselves on providing quality care to all tour patients. . .
At Wellington Dermatology we provide prompt diagnosis, treatment and care for all aspects of skin, hair and nail disorders and conditions. . . .
Southern Cross Health Society Affiliated Provider for Consultations
Skin Cancer Checks & Surgery, Female Genital Dermatology, Eczema, Psoriasis, Patch Testing (Skin Allergy Testing), Allergic Contact Dermatitis . . . .
