Appendicitis scar - What surgery do I undergo to remove the aftermath? (Photo)

When I was 5-6 years old, I underwent surgery due to appendicitis. When I stand up straight, you can clearly see the scar's depth, and as I bend over the depth of the scar exaggerates. What isn't bothering me is the skin tone and color of the scar, it is the depth of the scar. I exercise daily and work in construction, so at one point I was pretty low in body fat. I feel as if it is sewed into my abdomen, so my fat cannot evenly distribute itself. What surgery do I undergo to remove this depth?