Will Laser Help Dark, Thin-skinned Scar?

I fell off a quad bike in a desert and cut open my leg (near my ankle). Unfortunately, it wasn't stitched very well in Egypt, and once the stitches were removed, it left about 2 cm where there was no skin. I have since got a very dark scar that has not changed colour in the last year. The skin is very thin, a bit lumpy on one side. What can I do to lighten the scar? Would laser help or make it worse?

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