Chloasma or melasma is patches of dark skin that appear on an area of the face exposed to the sun. causes  chloasma is a very common skin disorder. it is most common in young women with the brownish skin tone but it can affect anyone. chloasma is often associated with the female hormones estrogen and progesterone.it is common in  pregnant women  women taking birth control pills (oral contraceptives)  women taking hormone replacement therapy (HRT) during menopause. being in the sun makes melasma more likely to develop  symptom  the only symptom of melasma is changing skin colour. however, this can cause stress about how you look. the skin colour changes are often an even brown colour  . They usually appear on the cheek forehead nose upper lips dark patches are usually symmetrical (matching on both sides of the face). B est homoeopathic doctor in patna  best in boring road  best doctor near me  best doctor for eczema best doctor for ...