[joanne1973]

I had my hair dyed on Saturday 5th from blond to dark brown. Brown is my natural colour and for the past 2 years I have been having blond highlights . I didn't have the money to go to the salon so all the blond was dissappearing and all my roots had gone back to brown this is when I decided to dye it all dark brown. Although I love the colour I have some blond showing through at the sides and I'm desperate to dye it again but don't know how long I have to leave it before doing it again. My sister who coloured it for me said I have to wait 4 weeks. Please tell me this is not true as I'm embarrassed at the blond bits poking through it looks awful.

[Perito]

There's no specified time to wait. That's because hair doesn't heal. There's really only one consideration, and that's your scalp. If the scalp is irritated, it's a poor idea to dye your hair until it heals. Your sister is uninformed.