The “bleeding” shown here can be reduced / eliminated if you drop the Color Noise Reduction value in Adobe Camera Raw (or wherever you are processing your images). At small sizes (8×10 and below) not a huge deal on the prints, but it will look more realistic. At larger sizes, the bleeding will be very apparent.

This is typically a problem with images where the head sizes are small to very small relative to the image size. There aren’t enough pixels to define the detail and the noise reduction algorithm blurs the pixels in the chroma channels, resulting in the “bleeding” of the predominantly red skintone values into the adjacent values.

Image © Copyright 2008 EDI Imaging.