I guess vitiligo is more of a serious issue. Have a look at this: A 23 year old girl was born black and lost all her pigment to this disease:
www.vitiligozone.com
Some mild white spots might be the result of pityriasis versicolor, not of vitiligo
www.vitiligozone.com
Some mild white spots might be the result of pityriasis versicolor, not of vitiligo