Melasma is a skin condition that causes light to dark brown patches to form on areas such as the forehead, chin, cheeks or the bridge of the nose. It is most common among adult women and can be triggered by hormone changes during pregnancy. Melasma is not contagious, and is not due to an allergy. Curing melasma can be as simple as incorporating strict sun protection strategies into your daily life, though consultation with a dermatologist is necessary to fully evaluate your skin.