Most small first or second degree burns heal in just a few weeks. If a small burn has been surgically closed with skin grafts, it may heal quickly. But larger wounds or more serious burns take up to three months or longer to heal.
Again, burns may have varying depths, depending on the cause of the burn or the damage. One part of the burn injury may be a first or second-degree burn. The other part may be deeper and more severe and affect the surrounding tissue, muscle, fat and bone.This makes treating a burn difficult, as various therapies will need to be applied, depending on the depth of the injury.