scaring/dark areas around the lips?

ive have suffered from eczema since i was little an a few years ago i developed cold sore like areas in the corners of my mouth i then went to the doctors and they gave me (Hydrocortisone) cream and that made the rough cold sore areas clear up but they left dark areas around my mouth. the area there is not rough but smooth.

-i've tried bio oil for a month or two and thats some what brightened up the apperance but by very little

-i've tried Garnier Dark Spot Corrector for a few weeks i didnt really notice much of a difference (http://www.superdrug.com/face/garnier-dark-spot-co...

is it a scar? will it stay for life? any cures?

the mouth: http://s1271.beta.photobucket.com/user/Ladyxabsol/... not nice :o

(using my big sisters photo bucket )

help :o