This works very well. One of the best and easiest ways to fix hot spots, like flash reflections on shiny skin, on a photograph is this:
- Make a duplicate layer, choose that layer and work from that layer.
- Choose the healing brush tool and in the options bar, for mode choose "DARKEN" and check the option "SAMPLE ALL LAYERS".
- Set your healing brush tool hardness to 0% (this is a soft brush) and size of the brush (use a brush size slightly bigger than the hot spot) and with OPTION+click (MAC) or ALT+click (PC) choose a skin tone you like. Then, paint on the shiny areas with the healing brush tool. Painting, as used here, means clicking and dragging on, or over, the areas where you want to cover the hot spot(s).
- Apply slight a slight Gaussian Blur (Filter>Blur) and lower the opacity of the layer.
What is great about this technique is you have cloned pixels on a separate layer and you can apply the slight Gaussian Blur filter and lower the opacity of the layer to blend your adjustments in and achieve a great end result.