When cut, I use powdered cayenne, this prevents the scar.
Once scared, I use BF&C as explained on the my teacher web page. It can be applied as B&W ointment and taken as capsule or tea. To get rid of a old scar may take a year or so.
A scar comes from incomplete healing. "IF" we have enough nutrients and good enough circulatin, there will be no scar.
The type of scar you get from an operation is the worse, because of the drugs uses to numb you as well as any kind of pain pills.