Acne scars are stubborn, and no single treatment is best for everyone. One or a combination of the following approaches might improve the appearance of your skin, depending on your scar type, your skin type and the severity of the scarring.
Home skin care.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.
Soft tissue fillers.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.
Steroid injection.Injecting steroids into some types of raised scars can improve the appearance of your skin.
Laser resurfacing.This 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.
Other energy-based procedures.Pulsed light sources and radiofrequency devices help make scars less noticeable without damaging the outer layer of skin. Results are subtle, and you might need repeat treatments.
This procedure is usually reserved for more severe scarring. Your doctor removes the top layer of skin with a rapidly rotating brush or other device. Surface scars may be completely removed, and deeper acne scars may appear less noticeable. Potential severe side effects include scarring and changes in skin color.
Chemical peel.Your doctor applies a chemical solution to the scar tissue to remove the top layer of skin and minimize the appearance of deeper scars. You can repeat mild and medium peels to maintain results. You can have only one deep peel. Potential side effects include changes in skin color, especially with deep peels used on dark skin.
Skin needling.Your doctor rolls a needle-studded device over the skin to stimulate collagen formation in the underlying tissue. It’s a safe, simple and possibly effective technique for acne scarring. It has minimal risk of discoloring the skin. Results are subtle, and you may need repeat treatments.
Using a minor procedure called punch excision, your doctor cuts out individual acne scars and repairs the wound with stitches or a skin graft. With a technique called subcision, your doctor inserts needles under the skin to loosen fibers below a scar.
OnabotulinumtoxinA (Botox).Sometimes the skin around acne scars puckers. Injecting Botox relaxes the surrounding skin, which may improve the appearance of an acne scar. Results are temporary, so repeat treatments are needed to retain the effect.
Further reading：CO2 fractional laser reconstruction and treatment of the skin