How can I get rid of my ingrown hair dark spots on my legs? (Photo)

I get ingrown hair on my legs when I shave and therefore getting laser hair removal soon but I'm not sure how to get rid of the brown marks left behind from ingrown hairs that have been removed. I've tried cocoa butter and many drug store creams but I don't seem to be getting any results. I've been doing research and have seen a lot about glycolic acid and hydroquinone. What concentrations should I get in these products and how can I use them hand in hand or will just one of these products do?