Meanwhile, persistent scars may require prescription medication or an in-office procedure from a dermatologist. Acne scars develop when your body produces either too much or too little collagen ...

The medication's acne-fighting benefits have been backed by science for decades, but it’s important to be aware of a few ...

Apply evenly and massage into scar once nightly. New scars: use for 8 weeks. Existing scars: use for 3–6 months.

≥6 months: apply at least 3 times daily. New scars: use for 8 weeks. Existing scars: use for 3–6 months. Sunscreen use: apply 15 mins before sun exposure; reapply every 2hrs.