Melasma is an acquired disorder characterized by hyperpigmented patches involving sun-exposed areas, mostly on the face.  It can be a source of emotional distress for those that suffer from it.  The term melasma is derived from the Greek word melas, meaning black.  When the condition arises during pregnancy,  it is called chloasma or “mask of pregnancy.”  Melasma is most common in women in their thirties and forties.  Although the condition affects all racial groups, it is most prevalent in dark-skinned individuals, especially Hispanic, Asian, and African Americans.