There are many options to treat deeper sugical scars depending on the area. Laser resurfacing is the best option to get rid of surgical scars.

What is laser skin resurfacing?

This procedure uses a laser to remove layers of damaged skin. skin turns black for next 4-5 days. new skin emerges after 10 days with softer tissue and more levelled skin.

So the goal is to remove uneven scar tissue. you always have to wear sunscreen and other antibiotic creams after the treatment.