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Woman suffering from chloasma (melasma), the appearance of large, brown patches on the skin due to a local increase in the dark pigment melanin. The condition can occur during pregnancy (when the nipples also become darker), as a side effect of oral contraceptives or during the menopause. The patches usually occur on the forehead, temples and cheeks and are completely harmless. They are sometimes called liver spots, although this term usually refers to the brown spots caused by senile lentigo.
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