She's always touching herself around me?

Not in a rude way ;)
Does it mean anything? A woman in work near enough every time I talk to her, pass her something, even look at her, she will touch herself. By this I mean her face, neck, she's even scratched her legs before now. I'm concerned I make her uneasy for some reason? I can't think of a reason we have known each other for a while, I've been looking how she is around other people and she doesn't tend to do this. She mostly touches or even scratches the side of her neck. What's going on in her mind?
She's always touching herself around me?
Post Opinion