Hi, Markeilia. The first step in treating hyper pigmentation is reduction of sun exposure. To help protect your skin from UV you need to apply each morning a good oil free suncreen.
Treatment for brown post acne spots includes over the counter whitening creams or stronger prescription whitening creams that contain hydroquinone. The more persistent brown spots can be treated by special superficial chemical peels (Jessner’s solution) or by the same lasers or IPLs used to treat red spots. These lasers destruct the excess melanin in the skin fading the brown spots.
The best 3 brown spots treatment ingredients available over the counter are Arbutin, Kojic Acid, and Licorice. If you need suggestions for good over the counter whitening products you may check the "tips" section of your personal plan on the app.