You mean how her skin has a lot of contrast but the other objects in the picture, like the background and her clothes, aren't quite as high contrast?
You play with the curves/contrast of the entire image while looking at how it effects her skin only. Then you paint in that contrast in a masked layer on her skin only.
That perserves the background and clothes, while making her skin contrasted.
You would then have to make a layer for color correction/saturation, as making the skin so high contrast will make it look discolored and/or bright red.
That's my take on it. I'm not an expert though!
