Best treatment for hyperpigmentation: PicoSure vs. Lummeca?

It sounds like you have melasma.  Melasma is tough to treat, but with that being said, we have used Max G IPL to treat the superficial pigment.  While I love IPL, it is limited to the depth of penetration.  Often times, melasma has deeper dermal pigmentation, in which case an IPL like Lumecca or Max G, may not get to.  That is when I switch to Picosure Focus Lens for the deeper pigment.  It is also important to use topicals (except when a patient is pregnant) like retinoic acid (tretinoin) along with skin lightening agens and Vitamin C serum and sunscreen.  Other options are Thulium based lasers that may also be helpful. 

I treat so many patients with hyperpigmentation and melasma from pregnancy.  Many of them were treated with the Picosure and go worse from it and other lasers.  Cosmelan is the best treatment for this condition and strict sun avoidance.  You are best to wait until September when there is no sun for any treatment and consult with an expert in the field.  Best, Dr. Green