I'm asian and I've had very persistent PIH on my cheeks. A lot of these marks have been there for almost, if not over, a year. Are these permanent? My routine currently consists of using Differin every night. What else can I do to help fade these dark marks?
Typically hyperpigmentation from acne is not permanent because it doesnt go that deep. More permanent hyperpigmentation has a bluish-gray appearance which signifies that it is in the dermal layer. Unfortunately Asian skin tends to hyperpigment more and can last longer when compared to Caucasian skin. You may want to try a skin brightening cream like hyrdoquinone or if you are nervous about that there are hydroquinone free products out there like Lytera, which are good. In addition there are also microdermabrasion, chemical peels, and laser to help hasten the marks, but I would go to a specialist that has a lot of experience working with asian skin types if you choose this route.