The Redhead

This redhead goes in to see her doctor complaining of experiencing pain all over her body. The doctor says this is nonsense as he's never seen these symptoms, but agrees to examine her. So he tells her to show him where it hurts and she then touches her chin. "Ouch" she says.
Then touches her shoulder and "ouch"
Then touches her breast and "ouch"
Then touches her hip and "ouch"
Then touches her knee and "ouch"
At this point the doctor says "OK that's enough, I see what the problem is" Then he adds "By the way you're not really a redhead are you?"
She replies "Well no I'm actually a blond, but how could you possibly know that?"
The doctor tells her "Well it's pretty obvious, your finger is broken."