Dr. Ankur Sarin on Instagram: "Did you know that PPD (para-phenylenediamine) in hair dyes is one of the most common causes of hair dye allergies? Symptoms can include itching, redness, swelling, or even more severe reactions. For those looking for safer alternatives, opt for PPD-free hair dyes! These options are gentler on the scalp and significantly reduce the risk of allergic reactions. Always remember to do a patch test before any hair dye application, even if it’s labeled hypoallergenic. PPD