People with sensitive skin, can get irritations that make your scalp itch. In most cases it will pass within a day. If it really burns when the hair dye is in your hair and you feel like you're getting blisters, rinse the hair dye out immediately. If you do an allergy test beforehand, you can avoid this problem. If you only suffer from itching, the WECOLOUR Colour Mask can be a welcome addition to the dye. This mask is mixed with the hair dye and protects the scalp and your hair during the dyeing process.