Scars caused by acne are more common than doctors once believed; most people will have acne scars that are mild. However, some will have scars that look significant even to others. The best approach is prevention and to treat acne right away as sometimes even mild acne can cause scarring, this can minimize the risk of permanent acne scars. There are a number of different looking scars caused by acne. The acne scar treatment you get will depend on the type of scars you have, as well as on your skin type. There are many medical advances in treating facial scars. Generally, scars on the chest and back do not respond as well to treatment.