There are a number of things that can help a picture like that but I hope you don't expect too much from it. Here is one possible way to make more of it. There will be many other interpretations.

First, since you mention photoshop I recommend opening the image in camera raw. (I'm assuming it was shot in jpeg). In the open dialog box select the file and from the drop down list of types select Camera Raw.

in camera raw apply some noise reduction carefully. That particular shot is rather noisy. It has some color noise as well as luminous noise.

Second thing I'd do is some careful sharpening. You'll want to experiment with the settings but maybe start with the first value of 100, threshold of 1, move detail until it helps, and move the masking until it balances out the look. Thom Hogan has some helpful tips on his site: http://www.sansmirror.com/articles/proper-noise-reduction-in.html

I'd probably apply some clarity to the image, too. And a white balance adjustment.

Once you open you have to do retouching. There's no way to fix that blown out area without retouching. Normally I'd put in more steps on doing this so that you can more easily undo but that would turn this into a very very long answer. So I'll just cut to the chase. Switch to the clone stamp tool and use the option or alt key to select an area right near the blown out area and then paint over the blown out area. Sample multiple spots and pay attention to the outline of the face. After some time you'll have a better version of this picture.

Good luck! Retouching takes time and practice. But sometimes a flaw like this can be "forgiven" if the rest of the picture works. It doesn't have to be perfect.