When a person's hair goes gray, why isn't it consistant on their whole body? eyebrows, arm hair,etc.?

Answer 1

variant circulation to these areas, and variant hair types.

Answer 2

Yes. My dad has white hair and white/grey chest hair. I'm starting to get white strands of hair, and I have similar ones on my chest as well.

Answer 3

sometimes you do, but there's more hair on your head usually. And when you get a headache, that's how you know you're going to get a white hair!