Take the Saturation slider and slide it to the left until the skin color looks pretty good, or the best that you can get it without looking fake. Don’t worry about the other parts of the picture right now.

Just concentrate on the skin color. We will fix the background colors next. Once you are satisfied with your skin color, click OK to close out of the Hue/Saturation window, and you will see your new layer above your original picture.

If you notice though, the adjustment that you made affected the entire image. To get that back restored to normal, click on the layer mask part of the new layer, and grab your brush tool. Make sure that your foreground color is set to black, and you have a large enough brush so that you are not brushing the background back a long time.

Now, using black, brush in the parts of the photo that you want to restore back to normal. I usually brush in the whole picture except the skin areas that I wanted to fix. This gives me the most realistic look