Poor scarring is related to poor surgical technique and/or poor choice of sutures. The best thing to do is a tummy tuck revision in order to:
1) revise your incision line. The line may be lowered and improved in appearance.
2) the above maneuver will allow us to hood your belly button over the incision line so that it is hidden in the belly button shadow. At this point you cannot revise the actual incision line; instead, just hide it.