This is a common problem, which happens quite often. The scars of a wound or stitches are permanent but if done with lots of care initially they are as minimal as possible. The scars are of the wound as well as cross hatches of stitches.
The scars can be reduced by plastic surgery where in the thickness and size is reduced and is placed in such a way that would not be very apparent. Health clubs and cosmetic clinics will not help but you could camouflage the scar with the help of some cosmetics but if it is depressed or elevated then it needs to be revised.
Laser can help smoothen the skin a little more after the scar revision is done to give you added advantage.