As you can see that the selection is not too good. To modify our selection I think Quick Mask tool is the easiest tool. You can also use other tools to modify your selections. To switch on quick selection tool you can press keyboard shortcut Q. After pressing Q your photo will be covered with red color. Don’t get scared. it is temporary.
The area which is overlayed with red color is not selected and the area which is showing it’s original color is actually the selected one.