Hair dye allergies can cause itchy, flaky skin called contact dermatitis. Remove and rinse the dye immediately if it's still in contact with your skin. Anaphylaxis from hair dye is rare but can be ...

A chemical compound used in many permanent hair dyes has been named Allergen of the Year for 2025 by the American Contact Dermatitis Society (ACDS). Toluene-2,5-diamine sulfate (PTDS) is an aromatic ...

Current estimates suggest that 50-80% of women and 10% of men 40 years of age and over in the United States and Europe use permanent hair dye products. The aromatic amine p-phenylenediamine (PPD) is ...