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Rashi ,if its a big ugly scar which is wide too,then get the help of a plastic surgeon to get it removed(excision and suturing).If it is very thin then you can go for laser
resurfacing.If depressed the a filler might help you.
Consult a plastic surgeon or a dermatologist
who can take a decision on this.
Cost of removal depends upon the type of surgery performed.It may range from 2000/- to 10,000/- (depending upon the surgeon).