Microneedling can help improve the appearance of acne scars by stimulating the skin to create new tissue. Here are some things to expect before and after microneedling: Preparation---Before microneedling, you should consult a dermatologist to discuss the procedure and any medications you should stop taking. Side effects----After microneedling, you might experience minor side effects like redness, swelling, bruising, and flaking. These side effects should go away within a few days. You can apply a post-treatment cream to soothe your skin. Recovery----You can usually return to work or school the day after microneedling, but you should avoid makeup for 24 hours. You should also avoid direct sun exposure, exfoliants, and alcohol-based skin products for a few days. Results---You might see a noticeable difference in your skin within a few days, but it can take up to a few months to see the full results. This is because it takes time for new collagen to be remodeled. Maintenance--You might need multiple microneedling treatments, usually spaced about 3 to 8 weeks apart. After that, you might need the procedure once a year for maintenance.