Typically, it takes 3 to 6 months for acne marks to disappear. However, if you have a scar, it means your skin is permanently damaged that requires medical attention. If acne has left raised spots or indentations, the damage has occurred even at a deeper level in the skin. A combination of treatments such as microdermabrasion, chemical peels, laser resurfacing, microneedling and fillers can be used to improve the appearance of your skin.