I get my hair dyed every 6-8 weeks and have been for years. Last done 4 weeks ago.
I’ve always had it done dark brown but recently felt that it was too dark and my roots and grey hairs looked worse when growing back.
I asked to start slowly moving back towards my natural hair colour which is a lighter brown.
Anyway this week I seem to have developed a blond streak at the front, not using anything different on it, only difference is that I’ve straighted it this week which I don’t usually do.
What on earth has caused this?