Alright, genetics time! I have always had a "white" stripe in my hair (it's actually platinum, not white). In high school, I knew two other women who had this: one, a teacher, had the stripe on top of her brow at her part, like mine, and the other, a student, had it in the back. It was then that I learned that this was a genetic trait, sometimes accompanied by two differently colored eyes, which none of us had. I mentioned this to my mom, and to my suprise, she replied "That makes sense! My mother had a white stripe in her hair. I had forgotten that."
But! I can't find any info online about this anywhere? Any help?

I have seen this many times, however, I know nothing about it either!   When I saw it it was one people with black hair of spanish decent.

I know someone who has this. I think it is called "Vitiligo". Here a bit I found online:

"Vitiligo of the scalp usually appears as a localized patch of white or gray hair, but total depigmentation of all scalp hair may occur."

Mellie