If you shoot a portrait and your subject is blushing or has red patches on their skin for whatever reason, removing the coloration is quick and easy in Photoshop. This 1-minute Photoshop tutorial by PiXimperfect shows how it’s done.
The technique involves using a Hue/Saturation adjustment layer to selectively target the areas of skin you’d like to tweak. Once you’ve isolated the patches, you can use the hue, saturation, and lightness sliders manipulate the skin tones to match the rest of the face.
Finally, use masking to paint the skin tone correction into just the areas you’d like to retouch. Voila!