What type of cream gets rid of dark marks and scars and what is the name of the brand?

i tripped over and scraped my knee, after a few days there is a dark mark. what cream gets rid of it?What type of cream gets rid of dark marks and scars and what is the name of the brand?
I heard Mederma works, from a friend. You should be able to pick it up over the counter, at any drugstore.What type of cream gets rid of dark marks and scars and what is the name of the brand?
scar serum or vitamin e oil, i use palmers cocoa butter formular with vitamin e
my dermatologist recommended a cream called Stieva (or maybe it just had the word ';stieva'; in the name), i think. it lightened whatever scars i had and also reduced the appearance of stretch marks on my legs. i couldn't find it anywhere in stores, though.. only at the national skin centre. by the way, that dark mark might just be pigmentation or whatever and may fade away by itself eventually.
you just need a cheap but safe and effective skin lightening cream to correct that problem. :-)
any cream or oil with vitamin e, but the best thing for scars is bio oil.