Patch Test (medicine)
A patch test is a method used to determine if a specific substance causes allergic inflammation of the skin. Any individual with eczema suspected of having allergic contact dermatitis and/or atopic dermatitis needs patch testing.
Patch testing helps identify which substances may be causing a reaction in a patient. It is intended to produce a local allergic reaction on a small area of your back where the diluted chemicals were planted. The chemicals included in the patch test kit are the offenders in approximately 85-90 percent of contact allergic eczema and include chemicals present in metals (e.g. nickel), rubber, leather, hair dyes, formaldehyde, lanolin, fragrance, preservative and other additives.
Other articles related to "patch":
... refer patients with suspected food allergies for patchtesting ... In a recent study of patients with chronic hives who were patchtested, those who were found allergic and avoided all contact with their allergen, including dietary intake, stopped having hives ... Often, patchtesting for food allergies is not necessary, but in selected individuals it may be helpful ...
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