Melasma is a form of pigmentation which causes discolouration. It is generally seen on the face in the form of small brown coloured patches. It is more common at the time of pregnancy or during a course of taking birth control pills. In such case, Melasma fades away after pregnancy or after discountinuing the intake of birth control pills. It can also be caused by the direct exposure to the sun, genetic factors or due to hormonal change. Though, Melasma generally fade away easily but if it persists then you should consult a Dermatologist. In order to get permanent relief from Melasma you can get laser treatment as well which removes the dark coloured pigments and helps regaining your natural skin colour.