To remove the imperfections of a face in a photograph thanks to the potential of Photoshop, all you have to do is open it. Then, duplicate the layer to avoid working with the original image. Right-click on the layer and select Duplicate layer.
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Now, select the layer you just created and invert the colors with the Control + I key combination.
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Change the image mode with the drop-down that you will see on the layer. Select Vivid Light. The picture will turn gray and you will probably barely make out the silhouette of the face.
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To visualize the relief of the face, apply the Gaussian Blur filter. You can access it from Filter and then Blur.
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Increase the radius of the effect until you can make out the silhouette of the face.
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Immediately apply the High Pass filter. Thanks to this effect, you will be able to merge the gray embossed layer with the layer below. Then, you will see the image a bit blurred. This effect is the one that blurs facial imperfections. For a natural look, you should play with the filter ratio to dilute the imperfections. Avoid overdoing it. When you think you have the right level, click OK.
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Once all this is done, it is time to retouch certain parts of the face. It is necessary to create a mask so that the changes only affect the areas we are interested in. To create a mask, click on the mask creation button.
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Select the mask you just created, enable the paint bucket tool, and fill the mask with black.
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Then, choose a brush, change the color to white, and paint the areas you want to improve.
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When you are done, remember to save the changes in a PSD file. This way, you can modify the image again in the future.