That is the number one reason why you shouldn’t re-dye your hair right away – exposing your hair to hard chemicals is not something you want to do too often. Permanent dye swell the Whole hair and change the color from within. Read on to find out. Is it too soon:? Well I dyed my blue/turquoise hair brown a few weeks ago (Exam session) and it ended up in a total mess: black/brown with many many green(evil green) parts inside. Try a different dye and don’t wash your hair as often. For people with stronger hair, however, five weeks should be completely enough. Split ends and hair breakage are two of the most common and also most disturbing consequences of too frequent coloring. How should I do this? Follow up with a deep conditioning, and let it air dry naturally. Bleach however will damage it. //