I don't know how long the scar has been formed. If it is just formed, you can consider using something like scar cream, such as Barker. If the scar has been formed for several months, you can consider going to a plastic surgery hospital for laser or surgery. Whether to use laser or surgery depends on the size of your scar.

At present, there is no way to completely remove scars, only to dilute or reduce the area of scars.