How to remove/lighten the dermatofibroma? (Photo)

I have a small bump on my lower leg, after visiting demotolgist, it's a dematofibroma. He injected some thing, and made it flat after few month. But now I can feel that whole area is dent. But you won't see its dent that obviously until you touch it. My main concern is that the red blood vessel are still there and it's been 5 months. I also saw there are color pignatation around it. Can I apply something to lighten it? Make it less visiable? Or can I removed it? How big will be the scar?

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