Hello and welcome to healthcaremagic You seem to have developed allergic contact dermatitis (ACD) to the allergens present in hair dye. ACD to hair dye presents as scalp itching, swelling, oozing involving the scalp and extending to the margins i.e the forehead, involving the pinna, the area in front and behind the ears and neck etc. If I was the treating doctor I would have started you on oral steroids for a week. They bring about the most rapid relief. Along with oral steroids, topical steroid lotion can be used locally twice daily for a week or so. A course of oral antibiotics may also be required if there is a secondary bacterial infection. An OTC antihistamine e.g cetrizine once daily for symptomatic itch relief is advisable. regards