What's the Most Effective Way to Reduce Appearance of the Scar? (photo)

My daughter who's 7 now had Nevus birthmark on her shoulder size of a half a pinkie and it was excised 3 y ago and again scar revision 2 y ago both times undergental anethesia and still it looks terrible. The doctor used resorbable stitches and the wound probably separated forming a keloid So she's seven now. Should I wait or should I seek treatment and what's the sat treatment to reduce appearance. And we did all the creams. I'm also in medical field ( dentist) would appreciate referral

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