Suggest Treatment For Hyperpigmentation Marks

Hi, I currently have combination skin that gets oily on my t-zone. however, my skin is so sensitive that even if i dont pick at my pimples they still cause a post inflammatory response. there are many reddish brown hyperpigmentation marks (mostly on my upper lip and forehead) that are very stubborn and absolutely wont go away. i've tried scar healing products such as bio oil, whitening masks, and natural healers like honey and lemon juice. nothing seems to be helping! what should/can i do?