1 doctor weighed in:
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
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
12 years in practice
93K people helped
Continue
107,000 doctors available
Read more answers from doctors