Generally, if the scar with a large area causes dysfunction, skin grafting and skin expander can be used for treatment, and if the area is small, laser combined with injection of scar softening needle can be used for treatment.
Because I haven't met before, I don't know the scar situation. I suggest going to the hospital for face-to-face consultation with a doctor.
Scar treatment is a gradual process. Don't expect too much from a treatment. Every treatment is a progressive process. Don't act in a hurry. I wish the patient an early health.