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. . .
nib Health Partner
Dermatologist, Eczema, Psoriasis, Dermatitis, Acne, Skin cancer, Hair disorders, Disorders of pigmentation, Phototherapy, Patch Testing
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 . . . .
