Use daily broad-spectrum sunscreen SPF 30 or higher
Apply a topical retinoid at night
Use azelaic acid
Use niacinamide
Use vitamin C serum
Try gentle chemical exfoliation with AHAs or BHAs
Keep skin moisturized with a non-comedogenic moisturizer
Avoid picking or squeezing acne
Treat active acne early to prevent more marks
Consider silicone gel or silicone sheets if scars are raised
Ask a dermatologist about prescription treatments
Ask a dermatologist about chemical peels
Ask a dermatologist about microneedling
Ask a dermatologist about laser treatment
Ask a dermatologist about pulsed dye laser for persistent redness
Be consistent for several weeks to months