Hyper-pigmentation of the skin of the face. Usually associated with pregnancy called the “mask of pregnancy”. Thus hormonal fluctuation is generally understood to be a contributing factor in why Melasma happens. Can also occur on Asian and hispanic skin that has been irritated to much and too often called Post traumatic hyper-pigmentation (PIH) If sufficient PIH spots are present, individual spots might coalesce and become a larger “Melasma”