Suggest Treatment Of The Rashes Caused By Dye

hi i had an alergic reaction to black hair dye. i dyed my hair alst november and started to come out in a rash all over my skin and re-dyd it again in febuary last but only then i knew the cause when i woke up the following morning and my head and face was swollen and the rash was worse. my skin is under controll now as i ve been seen a skin specailalist but my hair is falling out really badly and im bald at he back of my head and its speading, i ve tyed steriod creams and medication but nothing helps. my scalp is all scabby and cut. any suggestions to what to do next.