What To Do With Moles?
If your subject has a mole and you’re not sure you should remove it, reduce its impact. Get the Healing Brush tool (nested under the Spot Healing Brush tool [J]); make your brush size a little bit larger than the mole itself; Option-click (PC: Alt-click) a clean area of skin nearby; and click once right over the mole to remove it fully. Before doing anything else, go to Edit>Fade Healing Brush. Lower the Fade Opacity to bring back some of the mole.
by Scott Kelby