Acne scars will fade away over time, even without treatment. It can take 3 to 24 months to fully fade, although in some cases it may take longer. It all depend upon the skin tone.
Apply grated cucumber, orange peels, or lemon peels which are effective remedies to treat acne scars.
Use broad-spectrum sunscreen daily. The sun may darken the discolorations and increase fading time.