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What are skin allergy tests for hair dyes?

1 doctor weighed in
Dr. Paul Carter
Internal Medicine - Allergy & Immunology

In brief: Patch Test

To test for allergy to hair dye, a small patch containing the hair dye chemical is placed on the skin and held in place by tape for 48 to 72 hours.
After removal, the doctor will look for a local reaction where the hair dye contacted the skin to diagnose allergy to the dye (phenylenediamine).

In brief: Patch Test

To test for allergy to hair dye, a small patch containing the hair dye chemical is placed on the skin and held in place by tape for 48 to 72 hours.
After removal, the doctor will look for a local reaction where the hair dye contacted the skin to diagnose allergy to the dye (phenylenediamine).
Dr. Paul Carter
Dr. Paul Carter
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