long white hair on eyelid?

I was just looking in the mirror cause my eye was hurting. I then noticed a very long white hair, I assumed it wasn't mine so went to grab it and it was actually in my lower eye lid... what the heck? I'm 21 :( I've done a bit of googling but has anyone else had this? It's a lot longer than my other lashes but it being white I can't take a bloody picture of it. I'd say it was around 3 CM's. help