Shadow around the hand I just selected a round feather brush, gave it a black color, and made it a bit transparent, about 85%. Then drew a line around the fingers on the leg. Then used the blend tool to smooth out the shadow. Hair I used the smudge tool and the smallest round brush I had. Just smudged it down line by line. I threw in some reddish lines in the main part of the hair with a single pixel round brush as well. Make the strands at the end with different shapes, not strait. Just like you would draw hair on a sketch tabelet. Wiggle the lines a bit. Then smudge back and forth a bit until the colors look right.