Very often when taking portraits or 'people pictures' you'll run across someone who will want you to fix the blemishes on their skin. Small blemishes like a mole or small scar can be easily fixed using the clone or healing tool (photoshop).
Other skin issues such as burn scars, acne or acne scars, skin discolourations such as sunburn and birthmarks, and large areas of problem skin can take a little more work, but it can be done.
These samples show you a before and after image.
The complete image used in the tutorial was provided by Kathy Burns-Millyard; the girl is her lovely daughter. Please visit Kathy's galleries on Shutterstock for her professional photos.