Using sunscreen can help limit the contrast between unscarred skin and a scar. Some medicated creams, such as those containing azelaic acid or hydroxyl acids, might help too. Injecting collagen, fat or other substances under the skin can plump the skin over indented scars. The goal is to make the scars less noticeable. Results are temporary, so repeat treatments are needed to retain the effect. This method has little risk of changes in skin color. Injecting steroids into some types of raised scars can improve the appearance of your skin. his approach is increasingly popular and is often used on scars that were once treated with dermabrasion. This technique has an increased risk of side effects for people with darker skin or a history of keloids.