I have cs5 also. I just made a dup layer, used color sampler and sampled skin tone next to reddened area and choose a soft brush and lightened the area at about 10 %. I am sure you will get better edits with better definitions. We have an abundance of talent on DPR!!!
Paint brush and healing patch tools, Grain and noise filters,cut out good color skin and paste over red splotched areas and then blend using smudge and patch tool..
colour select red area, reduced the red by Hue&Saturation tool. Low opacity cloning off the cheek over forehead. Low opacity healing brush on same areas to remove rough edges of cloning.
Using Color Match (CS6) and Color replacement brush
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Best Regards
Sunshine
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