Hello. Thanks for writing to us at healthcaremagic Your main concern is Post-inflammatory Hyperpigmentation (PIH) which is a common complication of inflammatory acne If I was the treating doctor I would suggested you to use either a demelanizing cream containing one or more of the following ingredients like Azaleic acid, Kojic acid, hydroquinone, arbutin etc You may also opt for a few sessions of chemical peeling from your dermatologist e.g glycolic peeling is specially useful for PIH and together with topical treatment would hasten the resolution. I would suggest that you visit a dermatologist in your region. Your dermatologist will be able to assess your concern properly and and advice accordingly. Regards