Yes, IPL can treat hyperpigmentation left on the skin as a result of inflammation from acne. However, I would wait several months after it first presented before treating it in this way. This is because IPL treatments add heat to the skin and cause acute inflammation which can sometimes worsen post inflammatory hyperpigmentation if it is treated too soon. In the meantime, chemical peels are another option. In either case, it is important to begin treating with skin care products that will reduce both hyperpigmentation, and inflammation. Hydroquinone products, such as SkinMedica’s Epiquin, and anti-inflammatory products, such as SkinMedica’s TNS and Vitamin C & E will also help the condition, whether used alone, or in combination with procedures. Finacea is a topical medication that helps with both hyperpigmentation and inflammation, and is will also help to control acne as well. This can be used in combination with all of the other products mentioned above.