I did my hair roots a week ago, and yesterday I did a highlight to my hair. I did not leave it in long enough on my root area and it is brassy. I would like to re-do my roots with a 9NC, last week I did it with a 7NN and 6NN. My question is how long do I have to wait to re-do my root area with the 9NC?
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Normally they say that it is not good to dye or bleach the hair again for 6 to 8 weeks in order to give your hair time to heal from the bleaching and dying of the hair. I know other people say you can do this withing 2 weeks but it can also damage your hair. I would wait at least 4 weeks before you do it again. This is so that you don't damage your hair.
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