If your head is like a watermelon, then you know you are having an allergic reaction! This is what happened to the student Estelle after dyeing her hair. Now she warns against PPD! She had to experience firsthand how bad an allergic reaction can be: The head of the student Estelle swelled by twice its size after dyeing her hair. To warn everyone of such an incident, she reported her story to the French newspaper Le Parisien. And added photos that are really not for the faint of heart … The student had got a very average hair color from the drugstore. If you see these pictures, you will never want to dye your hair at home again