The following method is not fancy, nor is it difficult (though it does require a little patience). It's the kind of method which you might not need for six months, then suddenly need for three photos in a row. Learn it, and keep it in the back of your mind forever. You never know when it will be handy for skin problems, shadow problems, clothing problems, etc. It works exactly the same in both Photoshop and Elements.
For this demonstration, George Azmy has kindly allowed me to use this small section of a photograph he took. A lovely photo, but a slightly unflattering view of the subject's armpit, I'm sure you'll agree:
The "Handyman Method" involves two stages - first, a dodge and burn stage, followed by a colour fix stage.