to answer that question, one would first need to determine the type of scars you've attained from the burn.
These can include mild forms including change in pigmentation of the skin (hyper or hypo-pigmentation); actual scars like hypertrophic/atrophic scars or keloids; and even resultant contractures from burns.
Depending on the type of scar, treatments range from non ablative to ablative lasers, steroid injections into scars, and even scar revision surgery.
It would be best to be seen by your doctor to first determine the nature of your scars so that a thorough treatment plan can be formulated.
Cheers!
Shane