Pregnancy/breastfeeding pigmentation treatment: ① pregnancy: NOT recommended (laser/herbs may have unknown effects on fetus), ② breastfeeding: most laser OK, but herbal medicine restricted (some pass through milk), ③ pregnancy melasma (chloasma): often resolves after birth — wait 6–12 months postpartum before treating, ④ if treatment needed: only mild topical (azelaic acid, vitamin C are safe). Strict sun protection during pregnancy is most important. Resume full treatment after weaning.