My friend is wanting me to ask how long you have to wait until you can dye your hair again after you just did it over a week ago? She's afraid of her hair falling out. So, any advice will help her out. Thank you.

If your friend's hair is in healthy condition, she can re-color her hair right away to correct the mistake. However, when coloring your hair with a permanent hair color, it's best to re-color it about every 4 to 6 weeks. I also recommend using a deep conditioning treatment on your hair once a week or every other week to keep it healthy.