FJ........I have a couple........one sprouts from a spot on my forehead where I have ALWAYS had a cowlick. So now I have a white cowlick.

And I occasionally get he odd spot of alopecia (sp?)....my last one was behind my ear, which has since grown back, but it has grown back grey......

I henna my whole head of hair and it gets rid of the lot......the white spots go a different tone to the rest, but it blends in well........