Treatment for<unk> s is almost never done for health-related reasons, though it is sometimes done for aesthetic ones. Skin-bleaching products that inhibit pigmentation or cosmetic creams containing the ingredients alpha hydroxy acids or retinoids are known to be effective.<unk> s can also be frozen off with liquid nitrogen; that is, via cryosurgery.
Liver spot
Roth's spot
Forchheimer spots
Biliary sludge
Bitot's spots
Bier spots
Blind spot 
Elschnig spots