Discolored band around crown after using hair dye
I have been dying my hair blonde for years now, without any problems. I don't know if it is because I have more grey now, or my hair is just changing, but the past maybe year, maybe longer, I have just noticed in the past year... that after I dye my hair, maybe a couple weeks later, my roots show and then immediately after the natural roots, there is another band (almost like a second set of roots, about a shade lighter then my real roots) it goes around my hair line, if I hold it strait up in the air, like a band. The color is a bit goldish. So I have my roots, which are brown, a goldish lighter brown band, and then blonde hair... it sounds really worse then it is, but it is just something I notice, especially if it is back in a pony tail, I can totally see the different shades. But the band is really crazy, because it is perfectlye shaped, like it is meant to be there
Any help??
Thanks in advance...