There are three types of post-acne marks: Red spots, brown spots, and depressed acne scars. Red spots will usually fade away without treatment within a few months after your active acne is controlled. To decrease brown spots, you need to avoid sun exposure and use an oil-free sunscreen every day and can implement the use of a medicated dark spot remover to help fade them more quickly. Reduction of depressed acne scars is more complicated. The best treatment for these can be provided in a dermatologist's office using micro-needle radio frequency devices.