Cool Allergic Reaction To Hair Dye On Scalp Ideas. Web around 38% of people who color their hair report having an allergic reaction to the dye. Web if your scalp is itching after using hair dye, it might be due to allergic contact dermatitis, or an allergic reaction.

It is the main cause of most hair dye allergies. This article will cover how ppd works, and why it might harm your skin. Continued exposure just isn't safe, and reactions can worsen.