PPD: The most common allergy in hair dye is para-phenylenediamine (ppd). Interestingly, this allergy can also be seen in patients with a sulfa allergy. Some people just become allergic.
Answered 10/4/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
8 doctors weighed in across 3 answers
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