Leucoderma, also known as vitiligo, is a rare skin disease characterized by white spots and patches. The white patch or spot is called as leucoderma and when it occurs without any preceding disease it is called Vitiligo. Leucoderma in literal term means white skin.
Leukoderma is a cutaneous condition, an acquired condition with localized loss of pigmentation of the skin that may occur after any number of inflammatory skin conditions, burns, intralesional steroid injections, postdermabrasion, etc. It is largely a cosmetic problem, and is neither infectious nor contagious
In the case of white spots, instead of making more melanin, areas affected by sun damage stop making any melanin at all, causing these areas to completely lose pigment. Although these spots can be unsightly, they are benign.
NOTE: Do not confuse the white spots from sun damage with the skin disorder known as vitiligo.