Allergy due to hair colour. Swelling.

D problem has started to occur frm past 6-7 months...earlier last year in September i applied hair colour i washed it n it started itching n redness occurred on my face but subsided after 2-3hours ...den after 1 month again i put colour n d same thing happened...i had to colour my greys bcoz it luks bad without colouring n i lack confidence widout colouring my grey hair u cn understand...den i showed it to a skin specialist in December n she gave me livocitrizine tablet n a solution to apply on my scalp fr 5 days ...afterwhch every month i tk livocitrizine tablet before colouring n all ws gud like no swelling n all but now dis month inspite of taking d medicine before colouring my forehead swelled n i had headache fr about a whole day Pls understand my concern n help me wid d problem ...how to colour my hair without getting swelling...i hv switched many colours frm loreal to garnier to inoa...same problem everytime