Article: PPD in hair dye blamed for jumping rates of allergy

Rates of allergy to hair dye have jumped in several countries as more and younger people color their tresses, European researchers warn.

In an editorial in Saturday's British Medical Journal, dermatologists say case reports from Britain, Belgium, Portugal, Germany and Singapore suggest the incidence of the allergy is increasing.

Para-phenylenediamine, or PPD, and its chemical cousins called aromatic amines trigger the allergic reactions. Eczema may show up on the face or around the hairline, and in severe cases, a patient's face swells up leading to painful bruising that requires treatment in hospital.

More than two-thirds of hair dyes currently contain PPD or related chemicals, according to ...

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