Scaly Skin

I'm working on my yearbook project and I noticed on some of the renders various areas of the skin look scaly. Like on the guy, his neck looks scaly or discolored. I notice it more on this particular skin set than others. On the girl, maybe some on the cheek but overall I think it looks fine.
I've done about 40 different ones so far and was going back through each one. I'm trying to use a great deal of variety so some don't have the issue at all.
Is this something I can fix with a setting?


Megan.jpg
1306 x 921 - 719K


Zach.jpg
1306 x 921 - 645K
Comments
What are your render settings, especially the Shading Rate?
I will double check but normally it is something like .2