In this tutorial, we will learn to add stitches to any image of your choice.
Open your image.
Create a new layer by pressing shift+control+n. Use 20 feather brush and draw a line of #B17574 color. Change its blending mode from normal to darken.
Create another layer. Draw this curved line either with brush tool or with pen tool. Use #79393A color for that.
Create another layer and draw these random stitch lines with 2 pixel wide brush tool.
Apply bevel and emboss effect as shown on the stitch lines.
Image after applying above effect.
I have used the same technique to draw stiches at the left side of the face.