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fawad,it would be very difficult to completely vanish a scar mark,but it would fade gradually with time .But if the scar is very wide then you can consult a plastic surgeon who would excise it and make it smaller.If the scar is too red then you can also go for PDL laser
which too can soften a scar and reduce its appearance. You can use contraxtubex cream over the area twice a day to soften it a bit.This you would get in any medical store.Better to consult a dermatologist
before taking a decision.