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Substance tested in patch testing
Paraphenylenediamine (PPD)
The dye found in dark hair colourants and in seaside "black henna" tattoos — it causes intense eczema of the scalp and hairline.
A positive test result means safe colouring alternatives must be found.
This information is general and does not replace a consultation — diagnosis is always made in person. Mutual Clinic Braga 253 772 064 · Mutual Clinic Arcozelo 227 537 000 · B.clinic Funchal 291 142 030.