How do I treat an acne like bump or mark on my chin caused from a cured cyst? (Photo)

Cysts have been growing on my chin since 2014, they would stay for a week or two and go away, but at the beginning of this year (2016) 2 cysts grew on chin and they went away as my dermatologist said, but my skin took their shape or form, these bumps still appear as they're cysts, I've tried many topical gels to peel off my skin but they're all useless, so if there's a treatment what is it? or should i just leave my skin to self cure.

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