Hair Product Allergy: A Review of Epidemiology and Management

Allergy to hair products is increasingly common, manifesting as either delayed-type contact dermatitis or immediate-type hypersensitivity reactions. Common allergens include hair dyes, fragrances, persulfate salts, ammonium thioglycolate, coconut fatty acid derivatives, and acrylates, with hair dye being the most prevalent. The review discusses testing for hair dye allergies and suggests alternative dyes. Allergies to topical scalp medications, particularly minoxidil, are also noted due to its widespread use for hair growth. Hairdressers are at higher risk due to prolonged exposure, necessitating specific protective measures.