Hard to say without seeing it....never seen a Pigs skin before
I found this tutorial on adjusting skin with cmyk readouts (seem to be giving this one out a lot latley lol)...pretty good but left me wanting more:
http://www.smugmug.com/help/skin-tone
Theres a multi page article on the same thing in the most current issue of Digital Pro Photo magazine.
Also a book called Skin or something that deals with skin correction, I hoped for more skin tone information as its only a chapter, however I will probably still get it.
Hope this helps