Hi thanks for your question.
You’re allergic to hair dye, but you have desire to dye your hair.
There are different types of dye available in market.
You can go for patch test
(test for allergy
to dye) of different variety of hair dye to find out, to which one you’re not allergic
You can dye your hair with that one to which you’re not allergic.
You have to continue with anti hypertensive medicine for blood pressure.