LAUSR

Adverse skin reactions resulting from the use of hair dye are reported in 6% of individuals using hair dye products in the European general population (1, 2). Even though allergic contact dermatitis provokes unpleasant symptoms, such as itching and scaling, many patients with a hair dye allergy seem to continue dyeing their hair (3). This phenomenon is influenced by the severity of the allergic reaction, as 73% of patients with a weak positive reaction upon patch testing continued dyeing their hair, 49% of the patients who had strong positive reactions, and none of the patients with an extreme positive reaction (4). Although this phenomenon has often been observed and reported, the underlying reason has not yet been