Melasma produces dark brown patches of pigmentation on sun-exposed areas, usually in the face. Melasma tend to appear during pregnancy (but can fade there after), and in women who take oral contraceptives and will also fade if they discontinued the use thereof although it can occur in anyone.
This disorder is most common in sunny climates and in people of Latin or Asian origin. Melasma produces irregular patchy areas of dark color that are the same on both sides of the face. The pigmentation most often occurs in the centre of the face and on the cheeks, forehead, upper lip, and nose.
These patches do not itch or hurt and are only of cosmetic significance. You can use sunscreen on the dark patches and avoid sun exposure to prevent the condition from getting worse.