What can I do to remove the post inflammation on my forehead and sun spots on my cheeks?

I have always had beautiful skin and over the last year or so I have had rashes that have left hyperpigmentation mostly on my forehead with some spots on my cheekbones. I have skin that tans easily and rarely burns, but my skin shade is fair to light medium. I do get keloid scars in some cases not others, and haven't had scarring from injectables. What can I do to remedy this issue, I rarely spend time in the sun and always wear a solid sunscreen in and out of doors/hat in all seasons.