as per the details given it seems that you have hair dye allergy. most of the hair dye products contain a chemical called ppd (para phenylenediamine) which is responsible for allergic reactions. in such cases i advice my patients to strictly avoid application of hair dye. you may use herbal henna for dyeing hair. i advice my patients to apply topical steroid like hydrocortisone on the affected area. antihistaminics like levocetirizine also help. you need clinical examination. so you should visit your doctor so that he can examine you and give you prescription accordingly. you can share my opinion with him. stay healthy. consult a dermatologist online for further follow up --> <link>
i have developed hair dye allergy. please help.