I have Poikiloderma on neck and chest, and possibly tiny bit on face. I want HALO on face. If that goes well, want to do neck and chest next time. Heard preexisting melasma and hyperpigmentation increase risk of melasma and hyperpigmentation showing up more as HALO side effect. Does Poikiloderma (which I have) fall into same category as melasma and hyperpigmentation? If so, do I have greater risk of melasma, hyperpigmentation, and or increased Poikiloderma from HALO?