Using this tool: zoom in a select an area of skin.
Then click the blur tool: as many times as you want. I clicked it 3 times but remember to not over do it! Also, if you select skin in separate parts blur each part the same amount of times so it looks together.
If you missed any parts or if your picture has freckles use the Blur Tool and set your settings as mine, zoom in and blur the areas you missed.
And lastly I clicked twice.