There are various ways to do this. I prefer to teach a two-step method (even though there are some one-step methods available) because it is easiest to replicate in various situations.
First, a layer to lighten the hand. I used Levels, but Curves or Brightness/Contrast would work too.
Then clip a Photo Filter layer to it, and experiment with each of the Warming filters, and the Yellow filter. I used Yellow for this job. Play with the Density slider to taste.